Zhongshan 12Z msl_pressure 1990 - - - - - - - 982.7 - 989.0 - - 1991 - - - - 988.6 - 993.2 - - 979.3 - - 1992 - - - - - - - 983.3 - - - - 1993 - 981.8 986.7 987.5 984.0 985.9 980.7 979.5 981.9 979.5 984.7 986.7 1994 990.0 - - - - 999.0 989.7 983.4 - - 992.3 - 1995 - - - 989.2 - 990.9 998.5 986.1 - 986.9 - - 1996 990.9 - - - - - - - - - - - 1997 - - - - - - - - - 985.0 - 992.8 1998 - - 984.7 977.1 985.1 984.9 986.1 978.2 989.3 986.2 979.5 981.9 1999 989.5 - - - - - - 981.0 986.8 - 981.7 - 2000 981.6 - - - - - - 984.1 - - - - 2001 - - - - 988.6 985.8 - 983.7 - 979.5 981.0 - 2002 - - - - - - - 981.1 988.3 993.9 987.0 - 2003 - - - - 990.3 999.1 988.5 - - - - - 2004 - - - - - 982.5 981.8 981.0 979.7 - - - 2005 - - - - - - - - - - - 997.4 2006 987.6 988.2 984.8 988.0 - - - 995.3 987.2 980.8 980.9 985.6 2007 - - 988.4 989.9 - - - 986.2 986.3 - 985.9 983.8 2008 986.0 982.6 987.8 990.6 991.3 986.8 989.3 982.5 983.9 977.8 980.8 - 2009 987.3 - - - - - - - - - - -