Harry pressure 1987 990.3 987.3 986.0 987.0 981.5 985.0 990.1 974.3 986.9 976.4 977.4 983.5 1988 986.7 983.8 984.8 981.1 987.8 993.1 974.2 973.1 981.9 986.9 980.5 981.0 1989 982.7 985.4 982.5 985.9 968.8 979.3 - - - - - - 1990 - - - - - - - - - - - - 1991 - 987.2 979.0 982.3 984.1 986.9 988.8 979.6 975.4 975.1 980.9 992.6 1992 987.2 993.4 984.2 982.2 987.3 991.2 978.5 982.4 - - 975.9 980.8 1993 994.3 976.3 983.3 978.1 980.9 974.5 968.6 974.7 - - 977.7 982.6 1994 982.8 981.7 977.1 982.5 982.7 995.8 985.4 - - - - 874.0 1995 - - 875.8 867.5 865.6 876.5 882.3 870.7 863.8 865.2 867.8 - 1996 - - 868.4 870.3 - 868.0 - 984.6 984.9 - - - 1997 986.8 987.9 977.7 982.6 968.8 983.6 975.7 973.4 977.1 974.4 984.3 989.3 1998 985.2 979.3 979.1 972.8 979.8 973.6 976.8 975.3 985.5 976.9 970.5 981.3 1999 - 874.5 869.8 863.9 862.2 881.8 868.1 866.0 870.5 854.2 865.4 865.1 2000 869.2 872.0 873.9 870.3 869.9 872.4 867.2 869.6 873.5 864.0 873.4 883.7 2001 879.4 878.1 869.7 868.0 869.2 870.8 873.7 861.3 863.0 858.9 867.7 868.9 2002 874.0 866.9 877.7 866.8 879.8 876.4 869.7 862.3 874.8 878.8 874.3 870.3 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -