Great_Wall 12Z station_level_pressure
1993       -       -       -       -       -       -       -       -       -       -       -       -
1994       -       -       -       -       -       -       -       -       -       -       -       -
1995       -   991.7       -       -   991.7   989.1   990.4   993.9   987.5   993.9   981.7   985.1
1996   989.5       -   985.4   994.1   986.5   991.3       -   989.0       -   983.8       -       -
1997   986.6       -   988.0   985.3   997.3  1000.8       -       -   992.3   989.4   994.5       -
1998   983.6   994.3   988.7   994.5   998.5   994.7   977.5   984.1   989.0   980.2   982.7   981.5
1999   988.5   984.0   994.3   986.4   992.2   996.2   989.2   988.4   990.2   985.4   986.9   982.2
2000       -   995.2  1001.8       -       -       -       -       -       -       -       -       -
2001       -       -       -       -       -       -       -       -       -       -       -       -
2002       -       -       -       -       -       -       -       -       -       -       -       -
2003       -       -       -       -       -       -       -       -       -       -       -       -
2004       -       -       -       -       -       -       -       -       -       -       -       -
2005       -       -       -       -       -       -       -       -       -       -       -       -
2006       -       -   972.8   988.8       -       -       -   999.0       -       -   982.7   985.4
2007   990.1   986.8   988.4       -       -       -       -   986.2   997.7   984.4   990.0   982.8
2008       -   988.6   990.0   986.9   993.0   993.0   995.4   993.5   999.7       -       -   981.9
2009   984.8       -       -       -       -       -       -       -       -       -       -       -