"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
175261	1970	    	    	    	    	    	    	    	    	    	    	    	    
175261	1971	    	    	    	    	    	    	    	    	    	    	    	    
175261	1972	    	    	    	    	    	    	    	    	    	    	    	    
175261	1973	    	    	    	    	    	    	    	    	    	    	    	    
175261	1974	    	    	    	    	    	    	    	    	    	    	    	    
175261	1975	    	    	    	    	    	    	    	    	    	    	    	    
175261	1976	    	    	    	    	    	    	    	    	    	    	  279	  178
175261	1977	  488	    	    	  165	    	    	    	    	    	    	  107	  714
175261	1978	  726	  307	  211	    	    	    	    	    	    	    	  132	  328
175261	1979	  810	  201	    	    	    	    	    	    	    	  104	    	    
175261	1980	    5	   23	    	    	    	    	    	    	    	    	    	    
175261	1981	    	    	    	    	    	    	    	    	    	    	    	    
175261	1982	    	    	    	    	    	    	    	    	    	    	    	    
175261	1983	    	    	    	    	    	    	    	    	    	    	    	    
175261	1984	    	    	    	    	    	    	    	    	    	    	   41	    
175261	1985	    	    	    	    	    	    	    	    	    	    	    	    
175261	1986	    	    	    	    	    	    	    	    	    	    	    	    
175261	1987	    	    	    	    	    	    	    	    	    	    	    	    
175261	1988	    	    	    	    	    	    	    	    	    	   76	   51	  203
175261	1989	  406	  305	  384	    	    	    	    	    	    	    	    	   15
175261	1990	  627	  467	  206	   46	    	    	    	    	    	    	  155	  506
175261	1991	  612	  254	  241	  135	    	    	    	    	    	    	   91	  638
175261	1992	   64	  500	  358	  241	    	    	    	    	    	   30	   76	  145
175261	1993	  323	  930	  714	  201	    	    	    	    	    	    5	   53	  274