Priestley_Gl 00Z pressure 1988 - 911.6 - - - - - - - - - 911.5 1989 913.5 911.4 911.2 914.9 898.6 906.1 906.4 909.4 910.4 903.4 904.2 916.9 1990 916.3 908.0 910.7 917.6 921.9 913.0 920.0 905.5 898.4 907.2 910.8 912.2 1991 909.6 915.3 906.7 913.2 910.9 915.7 915.3 907.9 907.1 - - 921.3 1992 914.9 919.7 911.3 908.6 913.8 917.5 908.1 909.4 899.9 904.7 - - 1993 - 906.8 910.9 907.9 906.0 902.4 899.0 901.4 902.3 901.1 - - 1994 912.6 909.2 903.3 911.9 908.7 924.1 914.1 - - - - - 1995 - - 915.7 909.1 905.7 915.3 925.1 - 902.6 906.3 906.7 - 1996 913.9 917.6 912.1 907.5 910.5 908.6 909.3 913.8 915.2 899.3 - 922.4 1997 924.3 924.1 913.0 919.3 909.4 - - - - - - 918.1 1998 912.6 910.6 908.9 902.4 909.6 908.3 906.9 905.3 911.2 908.8 908.5 911.6 1999 912.0 913.9 910.6 905.2 903.9 - - - - - 900.7 903.1 2000 906.2 910.4 910.7 910.0 908.4 911.1 909.0 908.7 913.3 - - 921.4 2001 917.0 915.8 909.5 905.0 911.0 908.3 912.2 905.5 905.4 899.2 903.8 905.2 2002 911.3 906.1 916.0 907.6 917.4 917.0 912.5 902.1 911.9 914.4 909.5 906.1 2003 917.6 916.6 911.1 902.8 904.7 918.2 - - - - 908.1 920.4 2004 911.6 920.0 908.2 905.1 906.7 905.8 900.6 907.0 907.3 906.3 906.0 918.3 2005 914.7 907.0 909.9 905.8 908.3 914.0 - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -