"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
170100	1970	    	    	    	    	    	    	    	    	    	    	    	    
170100	1971	    	    	    	    	    	    	    	    	    	    	    	    
170100	1972	    	    	    	    	    	    	    	    	    	    	    	    
170100	1973	    	    	    	    	    	    	    	    	    	    	    	    
170100	1974	    	    	    	    	    	    	    	    	    	    	    	    
170100	1975	    	    	    	    	    	    	    	    	    	    	    	    
170100	1976	    	    	    	    	    	    	    	    	    	    	    	    
170100	1977	    	    	    	    	    	    	    	    	    	    	    	    
170100	1978	    	    	    	    	    	    	    	    	    	    	    	    
170100	1979	    	    	    	    	    	    	    	    	    	    	    	    
170100	1980	    	    	    	    	    	    	    	    	    	    	    	    
170100	1981	    	    	    	    	    	    	    	    	    	    	    	    
170100	1982	    	    	    	    	    	    	    	    	    	    	   25	  241
170100	1983	  389	  673	  145	   76	   25	    	    	    	    	    	    	  218
170100	1984	  889	  318	  775	   51	    	    	    	    	    	    	   13	  391
170100	1985	  323	  193	  419	  221	    	    	    	    	    	    	   64	  678
170100	1986	  343	  399	  510	    	    	    	    	    	    	    	  102	  130
170100	1987	 1090	  368	  732	   25	    	    	    	    	    	    	  508	  399
170100	1988	  483	  412	  206	    	    	    	    	    	    	  152	    	  152
170100	1989	  152	  579	  307	    	    	    	    	    	    	    	  254	   64
170100	1990	  470	  457	    	    	    	    	    	    	    	    	   43	   51
170100	1991	  500	  216	  178	    	    	    	    	    	    	    	    	    
170100	1992	   25	  330	   13	  660	    	    	    	    	    	    	  102	  190
170100	1993	  249	  572	  698	  279	    	    	    	    	    	    	    	  343