Year All greenhouse gases including aerosols Threshold 50 % probability of below 2 °C 50 % probability of below 1.5 °C All greenhouse gases*
1970 322.4 450 430 530 291.7
1975 332.4 450 430 530 302.9
1978 340.3 450 430 530 311.5
1979 343.5 450 430 530 314.9
1980 346.6 450 430 530 318.2
1981 349 450 430 530 320.9
1982 351.7 450 430 530 323.8
1983 354.2 450 430 530 326.7
1984 356.8 450 430 530 329.6
1985 359.3 450 430 530 332.4
1986 362 450 430 530 335.4
1987 364.6 450 430 530 338.3
1988 368.6 450 430 530 342.5
1989 371.4 450 430 530 345.6
1990 373.4 450 430 530 348
1991 376.4 450 430 530 350.7
1992 378.1 450 430 530 352.1
1993 379.6 450 430 530 353.4
1994 382.1 450 430 530 355.7
1995 385 450 430 530 358.4
1996 387.7 450 430 530 360.7
1997 389.6 450 430 530 362.4
1998 393.2 450 430 530 365.6
1999 396.3 450 430 530 368.5
2000 398.3 450 430 530 370.2
2001 400.1 450 430 530 372.4
2002 402.3 450 430 530 374.9
2003 405.3 450 430 530 378.2
2004 407 450 430 530 380.4
2005 409.6 450 430 530 383.3
2006 413.1 450 430 530 385.9
2007 416.1 450 430 530 388
2008 419.8 450 430 530 390.8
2009 422.5 450 430 530 392.6
2010 426.2 450 430 530 395.4
2011 429.5 450 430 530 397.8
2012 433 450 430 530 400.5
2013 437.3 450 430 530 403.9
2014 440.6 450 430 530 406.4