{"updated": "2026-09-19", "title": "原油は、1バレル何ドルだったか", "source": "アメリカ エネルギー情報局（EIA）のスポット価格", "source_url": "https://www.eia.gov/dnav/pet/pet_pri_spt_s1_w.htm", "license": "CC BY 4.0（数値）", "method": "公表値の年ごとの平均。点が10未満の年は出さない", "series": {"wti": {"label": "WTI", "unit": "ドル", "yearly": [{"year": "1986", "avg": 15.132, "points": 52}, {"year": "1987", "avg": 19.192, "points": 52}, {"year": "1988", "avg": 15.987, "points": 53}, {"year": "1989", "avg": 19.637, "points": 52}, {"year": "1990", "avg": 24.465, "points": 52}, {"year": "1991", "avg": 21.589, "points": 52}, {"year": "1992", "avg": 20.571, "points": 52}, {"year": "1993", "avg": 18.438, "points": 53}, {"year": "1994", "avg": 17.196, "points": 52}, {"year": "1995", "avg": 18.429, "points": 52}, {"year": "1996", "avg": 22.1, "points": 52}, {"year": "1997", "avg": 20.684, "points": 52}, {"year": "1998", "avg": 14.495, "points": 52}, {"year": "1999", "avg": 19.225, "points": 53}, {"year": "2000", "avg": 30.359, "points": 52}, {"year": "2001", "avg": 25.971, "points": 52}, {"year": "2002", "avg": 26.091, "points": 52}, {"year": "2003", "avg": 31.074, "points": 52}, {"year": "2004", "avg": 41.323, "points": 53}, {"year": "2005", "avg": 56.629, "points": 52}, {"year": "2006", "avg": 66.039, "points": 52}, {"year": "2007", "avg": 72.203, "points": 52}, {"year": "2008", "avg": 100.183, "points": 52}, {"year": "2009", "avg": 61.332, "points": 52}, {"year": "2010", "avg": 79.454, "points": 53}, {"year": "2011", "avg": 94.949, "points": 52}, {"year": "2012", "avg": 94.11, "points": 52}, {"year": "2013", "avg": 97.923, "points": 52}, {"year": "2014", "avg": 93.64, "points": 52}, {"year": "2015", "avg": 48.896, "points": 52}, {"year": "2016", "avg": 43.153, "points": 53}, {"year": "2017", "avg": 50.834, "points": 52}, {"year": "2018", "avg": 65.015, "points": 52}, {"year": "2019", "avg": 56.903, "points": 52}, {"year": "2020", "avg": 39.395, "points": 52}, {"year": "2021", "avg": 67.749, "points": 53}, {"year": "2022", "avg": 94.889, "points": 52}, {"year": "2023", "avg": 77.548, "points": 52}, {"year": "2024", "avg": 76.601, "points": 52}, {"year": "2025", "avg": 65.579, "points": 52}, {"year": "2026", "avg": 83.623, "points": 37}]}, "brent": {"label": "ブレント", "unit": "ドル", "yearly": [{"year": "1987", "avg": 18.544, "points": 33}, {"year": "1988", "avg": 14.979, "points": 53}, {"year": "1989", "avg": 18.259, "points": 52}, {"year": "1990", "avg": 23.661, "points": 52}, {"year": "1991", "avg": 20.093, "points": 52}, {"year": "1992", "avg": 19.32, "points": 52}, {"year": "1993", "avg": 17.03, "points": 53}, {"year": "1994", "avg": 15.84, "points": 52}, {"year": "1995", "avg": 17.037, "points": 52}, {"year": "1996", "avg": 20.629, "points": 52}, {"year": "1997", "avg": 19.201, "points": 52}, {"year": "1998", "avg": 12.838, "points": 52}, {"year": "1999", "avg": 17.812, "points": 53}, {"year": "2000", "avg": 28.541, "points": 52}, {"year": "2001", "avg": 24.449, "points": 52}, {"year": "2002", "avg": 24.942, "points": 52}, {"year": "2003", "avg": 28.857, "points": 52}, {"year": "2004", "avg": 38.132, "points": 53}, {"year": "2005", "avg": 54.535, "points": 52}, {"year": "2006", "avg": 65.15, "points": 52}, {"year": "2007", "avg": 72.383, "points": 52}, {"year": "2008", "avg": 97.53, "points": 52}, {"year": "2009", "avg": 61.058, "points": 52}, {"year": "2010", "avg": 79.541, "points": 53}, {"year": "2011", "avg": 111.384, "points": 52}, {"year": "2012", "avg": 111.672, "points": 52}, {"year": "2013", "avg": 108.622, "points": 52}, {"year": "2014", "avg": 99.475, "points": 52}, {"year": "2015", "avg": 52.565, "points": 52}, {"year": "2016", "avg": 43.551, "points": 53}, {"year": "2017", "avg": 54.226, "points": 52}, {"year": "2018", "avg": 71.097, "points": 52}, {"year": "2019", "avg": 64.257, "points": 52}, {"year": "2020", "avg": 41.898, "points": 52}, {"year": "2021", "avg": 70.472, "points": 53}, {"year": "2022", "avg": 100.876, "points": 52}, {"year": "2023", "avg": 82.412, "points": 52}, {"year": "2024", "avg": 80.568, "points": 52}, {"year": "2025", "avg": 69.183, "points": 52}, {"year": "2026", "avg": 91.074, "points": 37}]}}}