GF08 00Z pressure 1987 754.8 746.8 740.7 - 737.8 - - - - 734.9 - - 1988 - - - - - 752.1 733.8 - - - - - 1989 - - - - 729.8 737.7 - 742.5 740.0 - 742.6 753.8 1990 - 743.4 - - 749.0 - - - - 740.3 - - 1991 745.0 748.9 740.9 741.2 - 745.2 - - - 733.4 - 753.3 1992 749.6 - 743.9 - 744.6 746.9 - - 728.5 737.0 740.9 743.9 1993 753.1 - 741.4 - 731.4 734.6 - 726.8 730.8 - 738.6 743.1 1994 748.1 742.0 736.4 739.3 740.4 751.3 739.6 730.4 738.0 735.1 745.1 741.5 1995 743.9 - 742.0 739.1 - 742.3 756.4 - 727.7 735.3 - 743.4 1996 - - 738.8 740.5 737.3 742.2 - 739.9 744.9 734.5 747.5 - 1997 - - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - 749.2 748.4 752.8 739.6 749.3 745.8 743.8 749.1 - - - 2001 - - - 743.5 - - - - - - - 753.4 2002 - - 755.4 747.7 756.9 751.2 - - - 752.4 - 749.8 2003 - - - - - - 743.3 - - - - - 2004 - - - - - - - - - - - - 2005 - 748.7 751.0 742.4 - 754.0 744.5 740.5 - 743.0 749.4 764.7 2006 755.1 752.6 747.4 751.2 - - 738.7 752.6 745.0 - 750.1 751.6 2007 757.8 - 751.3 751.4 - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -