Harry 12Z pressure 1987 990.4 987.1 986.0 986.9 981.4 985.3 990.2 974.1 986.9 976.2 977.2 983.5 1988 986.6 983.9 984.7 981.3 987.9 993.0 974.4 972.5 981.9 987.2 980.3 980.9 1989 982.7 985.3 982.5 985.8 969.1 979.2 - - - - - - 1990 - - - - - - - - - - - - 1991 - 987.1 979.1 982.4 984.3 987.0 989.2 979.7 975.5 974.9 981.1 992.6 1992 987.2 993.3 984.2 982.2 987.3 991.4 978.2 981.9 - - 976.0 980.8 1993 994.5 976.1 983.6 977.9 981.1 974.6 968.4 974.7 - - 977.4 982.6 1994 982.5 981.7 976.9 982.6 983.2 995.7 985.3 - - - - - 1995 - - 989.3 981.0 978.7 984.9 882.4 - 863.3 865.3 - - 1996 - 877.8 868.4 870.2 - 868.3 - 985.1 984.9 - - - 1997 986.9 987.6 977.5 982.5 968.6 983.9 976.1 973.1 976.7 974.1 984.6 989.3 1998 985.3 979.4 979.2 972.8 979.7 974.0 977.1 975.3 985.5 976.9 970.4 981.3 1999 - 874.6 869.7 863.8 862.1 881.8 868.2 866.0 870.6 854.5 865.2 865.2 2000 869.2 872.0 873.8 870.2 869.9 872.7 867.3 869.3 873.2 863.5 873.5 883.8 2001 879.4 878.3 869.5 868.1 869.1 870.6 873.5 860.8 863.2 858.8 867.7 869.0 2002 874.0 866.9 877.6 866.7 879.7 875.9 869.7 862.2 874.5 879.2 874.1 870.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -