Great_Wall 18Z msl_pressure 1987 - - - - - - - - - 989.5 982.1 - 1988 - - - - 998.7 996.3 - 1001.5 - 1002.1 983.6 984.0 1989 - 988.7 989.4 992.8 - - 995.2 999.4 992.6 983.8 983.9 991.6 1990 990.0 - 984.4 990.5 1002.6 - 993.8 980.0 991.8 978.2 973.3 - 1991 988.0 - 989.8 - - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - - - - - - - - 984.8 985.6 985.5 1994 985.3 986.8 993.6 995.7 997.2 - - - 982.0 991.0 994.4 - 1995 - 992.5 984.8 - 993.3 990.1 991.2 995.9 989.4 994.0 983.4 987.9 1996 991.9 990.2 986.8 997.0 987.2 993.1 990.2 991.1 997.1 985.8 978.1 988.8 1997 988.0 - 990.0 986.6 999.0 1002.6 990.8 984.7 994.2 991.4 996.7 - 1998 985.3 994.8 990.2 995.1 1001.2 995.6 979.0 986.3 991.2 980.8 984.1 982.6 1999 989.7 985.3 996.3 988.2 993.6 996.6 990.2 989.6 991.1 985.1 987.9 983.2 2000 982.6 996.3 1003.9 990.1 999.7 997.0 1004.5 992.8 1002.0 990.8 995.5 989.7 2001 989.2 988.6 - 988.0 1000.2 992.6 997.1 981.0 991.4 984.9 980.6 - 2002 - 986.5 992.2 - 994.0 992.3 995.5 999.4 1002.7 989.3 990.6 990.3 2003 994.4 986.9 997.5 993.6 991.4 998.9 984.6 - - 985.8 984.8 995.1 2004 986.9 998.7 990.9 - 996.3 989.6 990.8 992.0 980.3 - - 991.4 2005 987.2 987.4 992.4 984.8 995.4 997.3 998.4 993.4 999.5 993.6 991.6 995.5 2006 - - 976.4 992.5 - - 993.5 1000.3 992.2 - 983.7 987.2 2007 990.4 988.1 - 990.9 - - 996.5 988.9 997.9 985.5 991.3 985.1 2008 988.4 989.7 991.5 988.4 994.7 994.7 997.6 994.1 1002.4 - 985.7 983.7 2009 985.9 - - - - - - - - - - -