Priestley_Gl 18Z pressure 1988 - 911.9 - - - - - - - - - 911.4 1989 - 911.5 911.4 914.3 899.1 906.1 906.4 909.9 909.4 903.2 904.7 917.0 1990 916.0 908.2 910.8 918.0 920.9 913.1 920.1 906.4 897.2 907.6 910.7 912.3 1991 909.6 915.4 906.7 912.3 - - - - 907.2 - - 921.4 1992 914.9 919.7 910.9 909.0 913.5 918.2 907.7 908.8 899.7 904.7 - 910.1 1993 - 905.9 910.7 907.0 906.5 901.3 899.0 901.0 901.9 901.2 906.7 909.5 1994 912.5 908.8 903.5 911.3 909.1 923.6 913.1 - - - - 908.4 1995 909.2 - 915.6 908.0 905.5 914.8 924.6 911.0 902.8 906.2 906.7 - 1996 914.3 917.3 912.3 906.6 910.8 908.2 909.4 914.1 915.1 898.9 - 922.3 1997 924.6 923.7 912.8 919.2 909.1 - - - - - - 917.8 1998 912.6 909.8 908.2 901.2 909.4 908.0 906.6 904.3 911.4 906.7 909.1 911.0 1999 911.7 914.4 910.1 904.7 904.3 - - - - - 901.1 903.2 2000 906.8 910.0 910.8 909.8 908.3 909.9 909.6 908.7 912.7 - - 921.7 2001 916.8 915.8 909.6 904.7 911.0 908.7 912.6 905.7 905.1 899.4 904.1 905.4 2002 911.4 905.9 916.4 906.7 917.9 916.7 912.9 902.1 911.5 914.7 909.3 906.3 2003 917.9 916.7 910.9 902.7 904.8 917.2 - - - - 908.3 920.1 2004 911.9 919.7 907.5 905.7 906.1 905.5 900.4 907.0 907.7 906.3 905.9 918.5 2005 914.5 907.0 909.0 905.4 908.3 913.7 - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -