"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
194502	1970	    	    	    	    	    	    	    	    	    	    	    	    
194502	1971	    	    	    	    	    	    	    	    	    	    	    	    
194502	1972	    	    	    	    	    	    	    	    	    	    	    	    
194502	1973	    	    	    	    	    	    	    	    	    	    	    	    
194502	1974	    	    	    	    	    	    	    	    	    	    	    	    
194502	1975	    	    	    	    	    	    	    	    	    	    	    	    
194502	1976	    	    	    	    	    	    	    	    	    	    	    	    
194502	1977	    	    	    	    	    	    	    	    	    	    	    	    
194502	1978	    	    	    	    	    	    	    	    	    	    	    	    
194502	1979	    	    	    	    	    	    	    	    	    	    	    	    
194502	1980	    	    	    	    	    	    	    	    	    	    	    	    
194502	1981	    	    	    	    	    	    	    	    	    	    	    	    
194502	1982	    	    	    	    	    	    	    	    	    	    	    	    
194502	1983	    	    	    	    	    	    	    	    	    	    	    	    
194502	1984	    	    	    	    	    	    	    	    	 16.4	 12.3	  6.2	  3.1
194502	1985	 -5.2	 -0.1	  4.1	  8.9	 14.4	 17.4	 22.0	 20.7	 17.7	 12.2	  7.1	 -1.1
194502	1986	 -0.7	 -2.1	  4.3	  8.9	 13.5	 18.0	 20.6	 20.4	 16.0	 11.3	  5.0	  1.4
194502	1987	 -2.3	 -2.3	  3.2	  7.5	 14.1	 19.3	 21.9	 20.6	 17.0	 10.4	  5.7	  1.4
194502	1988	 -2.6	 -0.5	  3.3	  7.7	 13.4	 19.1	 22.2	 22.8	 16.6	  9.3	  6.7	 -0.4
194502	1989	  0.6	 -1.5	  2.3	  6.8	 14.4	 18.7	 21.6	 21.2	 17.1	 11.4	  5.0	 -6.9
194502	1990	  1.3	  0.4	  3.8	  8.0	 12.0	 18.3	 22.4	 22.0	 17.3	 13.3	  7.5	  3.5
194502	1991	 -2.1	  1.2	  4.3	 10.0	    	 19.7	 22.6	 22.5	 16.2	 12.2	  6.4	  1.0
194502	1992	 -1.7	 -0.7	  0.9	  6.9	 12.5	 19.1	 20.0	 20.4	 17.1	 10.9	  5.4	  1.5
194502	1993	 -0.8	 -4.0	  1.3	  8.1	 15.3	 19.6	 22.7	 22.1	 17.8	 10.9	  7.1	  0.9