原油・ナフサ価格
年 /四半期	為替レート (円/$)	原油			ナフサ			国産価格 (千円/kl)
年 /四半期	為替レート (円/$)	数量(Ml)	価格($/BBL)	価格(千円/kl)	数量(Ml)	価格($/MT)	価格(千円/kl)	国産価格 (千円/kl)
91/1	133.42	71.831	23.16	19.440	6.099	271.08	25.318	27.300
/2	138.15	42.826	17.70	15.378	5.963	216.66	20.953	23.000
/3	137.36	54.316	18.55	16.024	6.147	210.70	20.259	22.300
/4	130.44	62.912	20.66	16.948	5.856	214.45	19.581	21.600
92/1	127.38	59.174	18.30	14.659	5.705	198.14	17.667	19.700
/2	131.43	58.177	18.54	15.325	6.178	190.37	17.514	19.500
/3	125.65	59.061	20.63	16.305	5.845	207.61	18.260	20.300
/4	122.62	66.802	20.02	15.439	6.028	193.88	16.641	18.600
93/1	122.20	67.089	18.14	13.942	5.639	183.57	15.703	17.700
/2	111.28	57.232	18.73	13.110	5.048	183.19	14.270	16.300
/3	105.97	60.649	17.38	11.584	5.432	173.63	12.879	14.900
/4	107.31	63.361	16.53	11.161	5.011	153.15	11.505	13.500
94/1	108.69	68.062	14.75	10.084	5.502	137.79	10.483	12.500
/2	103.94	59.330	15.39	10.062	5.351	144.99	10.549	12.500
/3	99.46	65.062	17.93	11.218	6.149	166.69	11.605	13.600
/4	98.53	70.677	17.62	10.920	6.920	174.87	12.061	14.100
95/1	97.98	70.761	18.05	11.127	6.718	176.77	12.124	14.100
/2	85.23	61.538	19.17	10.277	7.052	181.30	10.816	12.800
/3	91.56	60.944	17.68	10.180	7.583	173.49	11.120	13.100
/4	101.32	66.982	17.35	11.060	7.238	163.25	11.578	13.600
96/1	105.26	69.505	18.90	12.513	6.762	169.27	12.472	14.500
/2	107.15	57.126	19.56	13.180	7.393	188.53	14.141	16.100
/3	108.80	63.744	20.07	13.737	8.118	188.94	14.390	16.400
/4	112.22	67.970	22.96	16.206	7.657	214.86	16.878	18.900
97/1	119.95	67.137	23.39	17.649	7.077	239.17	20.082	22.100
/2	121.18	62.432	20.16	15.368	7.742	228.06	19.069	21.100
/3	116.96	65.216	19.05	14.018	7.702	212.76	17.171	19.200
/4	123.92	71.332	20.11	15.677	7.409	214.75	18.362	20.400
98/1	128.18	65.133	15.85	12.780	6.684	185.04	16.365	18.400
/2	134.10	60.917	13.07	11.024	6.308	162.82	15.066	17.100
/3	140.98	62.065	13.09	11.609	6.922	143.05	13.915	15.900
/4	122.67	64.806	13.43	10.361	7.427	148.71	12.587	14.600
99/1	115.91	63.939	11.35	8.272	7.322	129.03	10.319	12.300
/2	120.56	59.112	14.76	11.191	7.058	153.67	12.784	14.800
/3	115.95	59.390	18.41	13.431	8.021	196.80	15.745	17.700
/4	105.08	65.034	23.48	15.523	8.320	236.41	17.141	19.100
00/1	106.45	64.633	26.20	17.541	7.586	247.91	18.209	20.200
/2	106.99	58.613	26.55	17.871	7.380	266.80	19.696	21.700
/3	107.37	59.534	29.16	19.696	7.598	279.18	20.683	22.700
/4	108.95	65.219	31.95	21.894	7.789	315.89	23.747	25.700
01/1	116.55	66.186	25.64	18.800	7.163	273.24	21.973	24.000
/2	122.55	57.391	26.50	20.425	6.917	274.97	23.251	25.300
/3	122.66	58.213	26.56	20.494	6.695	254.79	21.565	23.600
/4	121.89	62.487	22.53	17.274	7.576	213.82	17.984	20.000
02/1	132.15	58.680	19.85	16.502	6.741	189.19	17.251	19.300
/2	128.55	53.622	24.86	20.104	6.826	240.88	21.366	23.400
/3	119.21	58.047	26.24	19.674	7.247	241.25	19.844	21.800
/4	122.88	64.397	27.30	21.104	7.816	258.22	21.895	23.900
03/1	119.10	67.211	30.45	22.813	6.872	300.75	24.716	26.700
/2	118.71	59.851	28.45	21.240	7.179	299.70	24.549	26.500
/3	118.33	58.438	28.35	21.102	7.087	272.50	22.249	24.200
/4	109.77	61.513	29.25	20.193	7.584	290.46	21.999	24.000
04/1	107.32	62.543	31.42	21.208	7.292	343.49	25.621	27.600
/2	109.25	55.771	34.81	23.921	6.979	356.93	27.100	29.100
/3	109.64	61.342	38.49	26.544	7.613	384.47	29.298	31.300
/4	106.87	64.358	40.49	27.215	7.581	443.70	32.955	35.000
05/1	104.11	61.749	40.76	26.694	7.242	431.70	31.235	33.200
/2	107.02	58.174	49.74	33.483	7.206	469.12	34.894	36.900
/3	110.78	64.505	56.12	39.108	6.384	481.63	37.083	39.100
/4	116.51	64.404	57.31	41.997	7.512	559.30	45.289	47.300
06/1	116.84	64.288	59.54	43.756	6.314	543.09	44.099	46.100
/2	114.59	60.872	64.99	46.845	6.650	587.08	46.755	48.800
/3	116.00	61.110	70.70	51.585	6.713	645.94	52.075	54.100
/4	117.54	60.464	60.74	44.907	7.621	564.50	46.115	48.100
07/1	119.53	62.220	57.42	43.176	7.000	563.44	46.808	48.800
/2	119.81	56.148	64.53	48.633	6.546	669.84	55.775	57.800
/3	119.06	59.470	70.94	53.123	6.252	696.93	57.667	59.700
/4	113.35	64.428	82.91	59.112	7.076	756.05	59.560	61.600
08/1	107.28	64.576	92.92	62.699	6.257	867.15	64.653	66.700
/2	103.24	58.283	109.61	71.182	5.260	959.89	68.876	70.900
/3	107.85	59.060	129.32	87.732	6.070	1.12	83.820	85.800
/4	98.59	59.756	77.04	47.777	5.756	730.40	50.049	52.000
09/1	92.33	55.798	44.26	25.703	4.313	389.12	24.970	27.000
/2	97.60	48.989	52.52	32.240	5.442	461.18	31.283	33.300
/3	94.37	53.439	70.26	41.704	6.615	597.80	39.208	41.200
/4	89.64	54.774	75.04	42.313	6.773	650.56	40.531	42.500
10/1	90.65	55.497	77.62	44.256	6.315	725.51	45.707	47.700
/2	92.29	49.336	81.33	47.211	6.075	742.93	47.653	49.700
/3	86.72	53.978	75.66	41.271	6.189	675.27	40.699	42.700
/4	82.80	55.807	82.08	42.749	7.236	749.00	43.100	45.100
11/1	82.53	55.892	96.72	50.212	6.616	878.37	50.384	52.400
/2	81.80	47.856	114.99	59.167	6.252	1.00	56.979	59.000
/3	78.42	51.377	112.87	55.678	6.421	970.30	52.885	54.900
/4	77.18	53.747	111.64	54.199	6.262	926.11	49.679	51.700
12/1	78.50	56.875	117.06	57.802	5.227	955.22	52.116	54.100
/2	80.69	51.942	122.80	62.326	5.481	1044.67	58.585	60.600
/3	78.85	55.783	105.90	52.519	6.389	871.47	47.755	49.800
/4	80.15	48.435	114.35	57.651	6.548	965.73	53.795	55.800
13/1	90.88	54.862	113.66	64.973	6.013	977.81	61.760	63.800
/2	98.37	50.353	107.53	66.534	6.093	929.24	63.532	65.500
/3	98.66	51.746	107.60	66.777	6.034	902.56	61.887	63.900
/4	99.58	54.755	112.85	70.681	6.835	951.30	65.835	67.800
14/1	103.21	57.294	111.46	72.356	6.651	975.62	69.980	72.000
/2	102.16	44.384	109.56	70.399	5.750	956.96	67.943	69.900
/3	102.92	48.600	109.43	70.842	6.391	963.82	68.941	70.900
/4	112.68	49.859	89.50	63.433	7.065	817.04	63.983	66.000
15/1	119.05	50.705	56.18	42.074	6.732	543.39	44.961	47.000
/2	120.77	45.402	59.55	45.241	7.153	557.52	46.795	48.800
/3	122.72	50.777	58.24	44.954	6.745	529.94	45.200	47.200
/4	121.29	48.614	46.20	35.248	7.169	461.65	38.915	40.900
16/1	116.72	54.417	33.08	24.284	6.823	398.02	32.288	34.300
/2	109.54	44.808	41.04	28.275	5.056	388.53	29.580	31.600
/3	102.77	48.591	46.23	29.881	5.945	410.06	29.287	31.300
/4	106.82	47.011	47.28	31.767	6.263	431.62	32.043	34.000
17/1	114.55	49.649	54.93	39.577	6.999	500.65	39.857	41.900
/2	111.11	42.217	53.37	37.300	6.729	481.03	37.147	39.100
/3	110.89	47.168	49.56	34.571	6.279	442.41	34.096	36.100
/4	112.78	47.696	58.56	41.541	7.051	543.51	42.602	44.600
18/1	109.45	45.776	66.45	45.746	7.006	603.17	45.882	47.900
/2	108.38	39.930	70.55	48.095	5.832	619.71	46.680	48.700
/3	111.07	44.553	76.60	53.513	6.441	667.69	51.541	53.500
/4	113.01	45.639	77.38	55.009	7.740	664.94	52.228	54.200
19/1	110.05	43.355	63.60	44.025	6.217	512.94	39.233	41.200
/2	110.40	42.300	71.55	49.689	5.929	565.13	43.362	45.400
/3	107.27	43.907	66.39	44.796	6.109	513.02	38.246	40.200
/4	108.51	44.301	65.83	44.927	6.600	521.51	39.328	41.300
20/1	108.94	41.525	67.51	46.261	6.455	565.44	42.810	44.800
/2	107.81	34.268	32.31	21.912	5.772	306.55	22.968	25.000
/3	106.43	33.682	40.69	27.238	6.970	380.96	28.179	30.200
/4	104.77	36.552	43.81	28.869	7.169	402.90	29.338	31.300
21/1	105.01	36.030	55.94	36.949	7.133	504.40	36.813	38.800
/2	109.57	12.924	66.26	45.663	2.457	605.54	46.112	48.100
/3	110.11	37.410	73.17	50.678	6.796	673.00	51.501	53.500

Kl : キロリットル
Ml : メガリットル = 1000 kl
MT : トン(Metric Ton) = 1000キログラム
BBL: バレル (158.987 l)

MT はアメリカの 1 トン (2000 ポンド = 約 907 kg)、イギリスの 1 トン (2240 ポンド = 約 1016 kg) と区別するための表記法です。

PARITY = ナフサ価格 / 原油価格