Marion station_level_pressure
2003   998.6  1006.2  1008.2  1011.7       -  1005.8  1003.3       -       -       -       -   999.5
2004       -  1007.7       -       -       -  1008.2  1002.0       -  1005.2       -       -  1002.8
2005  1002.5  1006.6       -       -  1005.1       -  1003.5  1001.6       -       -  1004.8       -
2006  1001.8  1001.6  1004.2  1002.8       -       -       -  1009.2  1003.3       -  1002.9       -
2007  1001.9  1006.5       -  1005.9       -       -   999.5  1005.3  1000.4  1008.3   998.8  1008.0
2008  1002.4  1005.8  1009.2  1002.3  1006.4       -       -  1005.1       -  1004.9  1003.1  1001.8
2009  1004.6       -       -       -       -       -       -       -       -       -       -       -