"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
171975	1970	    	    	    	    	    	    	    	    	    	    	    	    
171975	1971	    	    	    	    	    	    	    	    	    	    	    	    
171975	1972	    	    	    	    	    	    	    	    	    	    	    	    
171975	1973	    	    	    	    	    	    	    	    	    	  6.9	  0.2	 -2.5
171975	1974	 -6.7	    	    	  4.5	 10.2	    	 19.0	 20.0	 12.4	  3.5	  0.2	    
171975	1975	    	    	    	    	    	    	    	    	    	    	    	    
171975	1976	    	    	    	    	    	    	 19.2	 18.5	 11.6	  5.9	 -0.6	 -9.4
171975	1977	-10.3	 -8.2	  1.2	  3.9	 11.8	 14.9	 18.9	 17.6	 12.1	  7.4	  1.9	 -6.4
171975	1978	 -9.6	 -8.2	 -4.4	  2.4	 12.0	 15.6	 17.8	 17.0	 11.4	  6.7	  0.2	 -6.6
171975	1979	 -6.5	 -8.6	  0.3	  4.6	 11.6	 16.3	 20.4	 17.3	 13.6	  7.3	  3.6	 -4.4
171975	1980	 -8.0	 -8.4	 -2.6	  5.0	 11.3	 15.1	 18.9	 19.4	 12.4	  5.5	    	 -7.4
171975	1981	 -9.8	 -3.0	 -0.2	  5.0	 12.7	 16.7	 19.4	 18.2	 12.8	  5.8	  1.0	 -4.5
171975	1982	 -9.7	 -8.6	 -3.1	  2.3	 11.5	 14.4	 19.4	 16.2	 13.6	  7.3	  2.3	 -3.2
171975	1983	 -7.2	 -6.4	 -1.0	  4.7	 10.0	 17.0	 20.1	 18.9	 15.2	  7.2	  1.5	 -6.7
171975	1984	 -9.1	 -3.3	 -4.7	  5.0	 10.5	 16.0	 19.8	 20.2	 12.2	  8.1	  1.7	 -5.1
171975	1985	-11.4	 -6.0	 -3.2	  3.5	 10.7	 14.5	 19.5	 17.2	 13.6	  6.6	 -0.7	 -8.2
171975	1986	 -7.8	 -8.3	 -2.8	  6.4	 11.2	 14.2	 17.1	 16.2	 10.7	  5.8	 -2.3	 -7.2
171975	1987	 -8.5	 -8.6	 -1.6	  5.9	  9.9	 16.0	 18.3	 16.8	 12.4	  6.5	 -1.0	 -5.2
171975	1988	 -7.9	 -7.2	 -4.0	  3.7	    	 15.0	 20.3	 19.0	 11.9	  4.4	  1.4	 -8.3
171975	1989	 -8.0	 -8.1	 -4.8	  2.1	 12.6	 15.8	 18.8	 17.6	 14.0	  8.6	 -1.2	-11.5
171975	1990	 -5.3	 -6.3	 -1.6	  4.7	 10.4	 16.7	 19.5	 19.6	 13.2	  8.2	  1.0	 -4.9
171975	1991	 -8.9	 -6.3	 -2.1	  4.7	 12.3	 16.9	 18.7	 18.7	 12.1	  7.6	  1.5	 -7.7
171975	1992	 -8.7	 -7.7	 -4.8	  2.2	 10.8	 15.8	 16.4	 17.6	 13.2	  5.3	 -0.9	 -5.5
171975	1993	 -8.4	-10.0	 -3.9	  3.5	 11.1	 15.9	 18.9	 19.2	 12.9	  3.8	 -0.3	 -4.6