GF08 12Z pressure 1986 - - - - - - - - - - 740.3 - 1987 - 746.6 740.9 742.5 738.0 742.5 - 727.1 734.9 734.7 740.3 748.3 1988 750.7 743.5 744.5 - 749.5 751.9 733.8 737.6 - - 741.4 744.6 1989 750.5 742.3 740.9 741.8 729.8 737.8 732.9 743.4 738.9 738.9 742.2 753.8 1990 750.7 743.9 744.0 750.3 749.0 744.8 745.7 735.5 730.6 740.2 743.5 749.2 1991 745.4 748.9 740.9 741.9 739.9 745.2 749.8 736.9 737.8 732.4 746.3 753.6 1992 749.4 752.1 744.4 - 744.7 746.7 736.3 737.2 728.2 737.3 740.6 744.2 1993 752.8 742.1 741.5 738.6 731.3 736.5 729.1 726.8 732.0 731.9 738.1 742.6 1994 747.7 742.2 737.3 739.8 741.1 751.0 739.6 730.3 739.2 734.7 744.9 741.2 1995 743.9 743.8 741.7 739.0 735.4 742.9 755.8 737.2 727.9 735.9 744.2 743.4 1996 - 747.8 739.0 740.2 737.0 742.7 741.9 741.1 745.1 735.2 747.1 748.2 1997 747.3 - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - 749.5 748.8 752.8 740.6 748.9 746.1 745.7 749.3 - - - 2001 - - - 743.8 - - - - - - - 753.1 2002 - 747.2 756.0 748.1 - 751.1 - - - 752.8 - - 2003 - - - - - 756.9 742.8 - - - - - 2004 - - - - - - - - - - - - 2005 - 749.0 752.0 742.6 747.4 753.8 744.2 740.8 742.3 743.0 749.4 764.4 2006 754.8 752.4 747.8 752.0 - - 739.5 752.0 745.4 741.3 750.6 751.6 2007 757.7 750.7 752.1 751.5 - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -