Priestley_Gl pressure 1988 - 911.5 - - - - - - - - - 911.3 1989 913.6 911.3 911.2 914.5 898.9 906.0 906.4 909.6 910.0 903.1 904.3 916.8 1990 916.0 908.0 910.7 917.8 921.4 912.9 920.3 905.9 897.6 907.3 910.6 912.2 1991 909.5 915.3 906.6 912.7 910.7 915.3 915.4 907.4 906.8 - - 921.3 1992 914.8 919.6 911.0 908.8 913.8 917.9 908.0 909.1 900.1 904.5 - - 1993 - 906.3 910.9 907.7 906.4 901.8 899.3 901.3 902.2 901.1 906.4 909.4 1994 912.5 908.8 903.3 911.5 908.9 923.7 913.5 - - - - 908.3 1995 908.8 909.2 915.6 908.5 905.5 915.1 924.9 912.0 902.6 906.1 906.5 - 1996 914.0 917.2 912.0 907.0 910.7 908.3 909.4 914.1 915.1 899.1 - 922.3 1997 924.3 923.6 912.9 919.1 909.4 - - - - - - 917.9 1998 912.5 909.8 908.9 902.5 909.3 908.8 906.7 905.1 911.3 907.9 908.9 911.3 1999 911.7 913.9 910.2 905.1 904.1 - - - - - 900.8 903.1 2000 906.4 909.9 910.7 909.9 908.4 910.7 909.0 909.0 913.0 - - 921.4 2001 916.9 915.6 909.3 904.7 911.0 908.4 912.5 905.4 904.9 899.2 903.7 905.3 2002 911.3 905.8 916.0 907.2 917.5 916.7 912.6 902.1 911.6 914.5 909.4 906.2 2003 917.7 916.4 911.0 902.9 904.9 917.9 - - - - 908.2 920.2 2004 911.7 919.7 907.9 905.5 906.7 905.7 900.6 907.1 907.6 906.1 905.7 918.4 2005 914.5 907.0 909.4 905.4 908.3 913.6 - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -