Year,Value,Global,SLP,Jan-Dec,(hPa) 1980,1011.282 1981,1011.307 1982,1011.359 1983,1011.358 1984,1011.327 1985,1011.254 1986,1011.247 1987,1011.287 1988,1011.321 1989,1011.335 1990,1011.369 1991,1011.366 1992,1011.335 1993,1011.349 1994,1011.347 1995,1011.369 1996,1011.399 1997,1011.434 1998,1011.459 1999,1011.38 2000,1011.44 2001,1011.409 2002,1011.419 2003,1011.476 2004,1011.449 2005,1011.521 2006,1011.49 2007,1011.446 2008,1011.415 2009,1011.469 2010,1011.432 2011,1011.445 2012,1011.435 2013,1011.402 2014,1011.405 2015,1011.388 2016,1011.417 2017,1011.454 2018,1011.479 2019,1011.513 2020,1011.556 2021,1011.526 2022,1011.483 2023,1011.494 2024,1011.512