"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	    	    	    	    	    	    	    	    	    	    	    	  254
170200	1987	  902	   76	  686	    	    	    	    	    	    	    	    	  178
170200	1988	  673	  610	   51	   25	    	    	    	    	    	   25	  305	  241
170200	1989	  508	  635	  279	  229	    	    	    	    	    	    	    	  508
170200	1990	  737	  356	  254	  216	   51	    	    	    	    	    	  737	  457
170200	1991	  660	  229	  660	   64	    	    	    	    	    	    	  178	  305
170200	1992	  216	  648	   76	  203	    	    	    	    	    	   13	   51	  254
170200	1993	  381	  546	  483	   25	    	    	    	    	    	    	  305	  279