GEO3 00Z pressure 1982 - 752.0 746.5 745.3 746.4 744.8 746.6 741.4 738.1 746.6 756.1 764.0 1983 759.0 757.1 750.4 746.3 751.6 749.4 743.8 744.3 743.6 741.8 745.9 751.5 1984 759.5 754.5 749.4 747.5 - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - 736.7 741.5 - - 1987 - - - - - - - - - - - - 1988 762.2 - - 755.1 766.7 767.7 754.3 - 760.1 753.6 - 758.8 1989 - - 763.5 - 747.1 750.5 761.5 774.0 772.7 773.2 781.3 - 1990 - 779.4 779.2 783.4 783.6 778.6 786.5 - 763.2 776.1 778.0 781.4 1991 - 785.4 775.8 775.7 775.5 780.2 - 770.8 772.2 768.2 778.6 - 1992 - 785.9 779.0 778.4 783.7 781.9 773.8 770.1 765.7 772.9 772.2 - 1993 - - - 768.8 766.1 765.8 761.6 759.9 - - - 777.1 1994 779.1 775.1 771.3 776.4 775.7 783.9 776.1 767.5 771.0 769.6 779.2 775.4 1995 777.1 - 775.2 775.9 770.2 773.8 781.2 770.8 759.6 772.3 777.0 777.0 1996 - 781.7 772.6 773.8 770.9 775.2 776.8 772.7 781.4 769.2 780.7 - 1997 781.2 777.3 770.0 778.2 769.5 778.6 764.6 767.8 766.3 771.1 781.7 783.3 1998 778.8 776.7 774.1 761.9 772.5 771.7 769.7 765.3 773.1 771.1 770.6 775.2 1999 780.9 779.6 776.1 770.3 770.6 783.2 769.6 769.4 771.5 762.5 774.3 773.1 2000 775.1 775.6 773.4 776.5 768.8 776.5 772.1 771.6 775.9 766.7 780.3 786.0 2001 780.3 - - 768.6 - - - - - - - - 2002 - - 780.9 - - 775.1 776.8 767.1 773.5 779.8 776.8 776.0 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - 782.8 772.7 771.8 774.3 - 775.8 2008 779.4 774.5 - 779.0 776.8 770.7 773.4 768.2 770.4 - - - 2009 - - - - - - - - - - - -