{
  "unit": "US dollars per barrel (Brent minus WTI)",
  "period": "1980-2025 IMF WEO annual averages",
  "years": [
    1980,
    1981,
    1982,
    1983,
    1984,
    1985,
    1986,
    1987,
    1988,
    1989,
    1990,
    1991,
    1992,
    1993,
    1994,
    1995,
    1996,
    1997,
    1998,
    1999,
    2000,
    2001,
    2002,
    2003,
    2004,
    2005,
    2006,
    2007,
    2008,
    2009,
    2010,
    2011,
    2012,
    2013,
    2014,
    2015,
    2016,
    2017,
    2018,
    2019,
    2020,
    2021,
    2022,
    2023,
    2024,
    2025
  ],
  "spread": [
    0.04,
    0.78,
    0.28,
    -0.59,
    -0.64,
    -0.36,
    -0.62,
    -0.75,
    -1.01,
    -1.39,
    -0.8,
    -1.41,
    -1.22,
    -1.39,
    -1.21,
    -1.22,
    -1.34,
    -1.28,
    -1.24,
    -1.13,
    -1.49,
    -1.22,
    -1.0,
    -2.36,
    -3.19,
    -1.79,
    -0.48,
    0.31,
    -2.23,
    -0.14,
    0.38,
    16.48,
    17.83,
    11.01,
    6.23,
    4.22,
    1.84,
    3.98,
    6.8,
    7.26,
    3.98,
    2.87,
    4.2,
    4.72,
    3.3,
    2.83
  ],
  "wide_threshold": 10,
  "reported_daily_spread_2026_09_26": 11.89,
  "reported_daily_spread_note": "The 26 Sep 2026 $11.89 gap is a same-day print, not an annual average, and is not plotted as an IMF observation."
}