Priestley_Gl 06Z pressure 1988 - 911.0 - - - - - - - 916.6 - 911.0 1989 - 910.8 910.7 914.4 899.2 905.9 906.6 909.1 910.1 902.7 904.2 916.5 1990 915.6 907.6 910.4 917.8 921.4 912.7 920.8 905.3 897.6 906.8 910.2 912.1 1991 909.1 915.0 906.4 912.8 911.1 915.4 915.4 907.7 906.0 - - 920.9 1992 914.5 919.3 910.8 908.8 913.8 917.8 908.1 909.0 900.4 904.3 - 910.1 1993 922.0 906.0 910.9 907.9 906.3 902.1 899.5 901.6 902.2 900.9 906.0 909.2 1994 912.3 908.4 902.8 911.4 908.5 923.5 913.5 - - - - 907.9 1995 908.6 909.2 915.3 908.4 906.0 915.2 925.1 911.9 903.0 905.8 906.2 - 1996 913.8 916.8 911.4 906.8 910.6 908.3 909.6 914.1 914.8 898.9 - 922.1 1997 923.8 923.3 912.6 918.9 909.5 - - - - - - 917.7 1998 912.3 909.2 910.2 904.1 909.7 909.7 906.2 904.9 911.0 909.1 909.0 911.5 1999 911.3 913.3 909.9 905.2 904.0 - - - - - 900.5 902.9 2000 906.0 909.7 910.5 909.8 908.5 911.0 908.6 909.3 913.0 - - 921.1 2001 916.6 915.3 908.7 904.7 910.8 907.9 912.5 905.1 904.5 898.7 903.3 905.1 2002 911.1 905.4 915.3 907.3 917.2 916.4 912.4 902.1 911.3 914.2 909.2 906.0 2003 917.5 916.0 910.7 903.1 904.8 918.4 - - - - 907.9 920.1 2004 911.5 919.5 907.8 905.5 907.0 906.2 900.5 907.1 907.3 905.6 905.4 918.3 2005 914.3 906.9 909.2 905.3 908.1 913.7 - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -