#undef=-9999
1979,7,1,25.2
1980,7,1,23.8
1981,7,1,26.3
1982,7,1,23.1
1983,7,1,23.8
1984,7,1,26.2
1985,7,1,26.3
1986,7,1,23.9
1987,7,1,27
1988,7,1,22.4
1989,7,1,24.1
1990,7,1,25.7
1991,7,1,26.7
1992,7,1,25.5
1993,7,1,22.5
1994,7,1,28.3
1995,7,1,26.4
1996,7,1,26.2
1997,7,1,26.6
1998,7,1,25.3
1999,7,1,25.9
2000,7,1,27.7
2001,7,1,28.5
2002,7,1,28
2003,7,1,22.8
2004,7,1,28.5
2005,7,1,25.6
2006,7,1,25.6
2007,7,1,24.4
2008,7,1,27