"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
170200	1970	    	    	    	    	    	    	    	    	    	    	    	    
170200	1971	    	    	    	    	    	    	    	    	    	    	    	    
170200	1972	    	    	    	    	    	    	    	    	    	    	    	    
170200	1973	    	    	    	    	    	    	    	    	    	    	    	    
170200	1974	    	    	    	    	    	    	    	    	    	    	    	    
170200	1975	    	    	    	    	    	    	    	    	    	    	    	    
170200	1976	    	    	    	    	    	    	    	    	    	    	    	    
170200	1977	    	    	    	    	    	    	    	    	    	    	    	    
170200	1978	    	    	    	    	    	    	    	    	    	    	    	    
170200	1979	    	    	    	    	    	    	    	    	    	    	    	    
170200	1980	    	    	    	    	    	    	    	    	    	    	    	    
170200	1981	    	    	    	    	    	    	    	    	    	    	    	    
170200	1982	    	    	    	    	    	    	    	    	    	    	    	    
170200	1983	    	    	    	    	    	    	    	    	    	    	    	    
170200	1984	    	    	    	    	    	    	    	    	    	    	    	    
170200	1985	    	    	    	    	    	    	    	    	    	    	    	    
170200	1986	    	    	    	    	 10.5	 12.2	 16.0	 15.4	  9.3	  4.9	 -3.5	 -7.0
170200	1987	 -7.6	 -7.1	 -1.1	  5.4	  9.1	 15.1	 17.7	 15.3	 11.7	  5.4	 -2.5	 -6.9
170200	1988	 -7.8	 -6.9	 -5.3	  2.9	 10.6	 13.9	 18.4	 17.1	 10.6	  4.0	  0.3	 -7.6
170200	1989	 -7.6	 -6.8	 -4.3	  1.4	 12.2	 14.7	 16.8	 16.9	 12.5	  5.8	 -2.4	-10.5
170200	1990	 -7.2	 -6.9	 -4.1	  2.9	  8.8	 15.8	 17.5	 18.1	 11.1	  6.2	 -1.4	 -6.2
170200	1991	 -8.4	 -6.2	 -4.6	  2.5	  9.8	 15.0	 17.5	 17.8	  9.3	  5.5	 -1.0	 -8.2
170200	1992	 -8.5	 -8.4	 -5.8	  1.3	 10.1	 14.5	 14.5	 16.4	 12.7	  3.8	 -2.3	 -6.6
170200	1993	 -7.6	 -7.5	 -4.0	  2.8	  9.7	 14.2	 17.1	 17.2	 11.5	  2.6	 -2.1	 -5.4