"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
173261	1970	    	    	    	    	    	    	    	    	    	    	    	    
173261	1971	    	    	    	    	    	    	    	    	    	    	    	    
173261	1972	    	    	    	    	    	    	    	    	    	    	    	    
173261	1973	    	    	    	    	    	    	    	    	    	    	    	    
173261	1974	    	    	    	    	    	    	    	    	    	    	   71	   86
173261	1975	  414	  102	  549	  330	    	    	    	    	    	    	    	  394
173261	1976	  533	  483	  538	    	    	    	    	    	    	    	    	  127
173261	1977	    	    	    	    	    	    	    	    	    	    	    	   81
173261	1978	    	    	    	    	    	    	    	    	    	    	    	    
173261	1979	    	    	    	    	    	    	    	    	    	    	    	    
173261	1980	   86	  104	  107	    	    	    	    	    	    	    	    	    
173261	1981	    	    	    	    	    	    	    	    	    	    	    	    
173261	1982	    	    	    	    	    	    	    	    	    	    	    	  452
173261	1983	  414	    	    	    	    	    	    	    	    	    	    	    
173261	1984	  434	  254	    	    	    	    	    	    	    	    	    	  406
173261	1985	  183	   89	  318	  152	    	    	    	    	    	    	    	  109
173261	1986	  521	    	    	    	    	    	    	    	    	    	    	    
173261	1987	  965	  102	  597	    	    	    	    	    	    	    	  254	    
173261	1988	    	    	    	    	    	    	    	    	    	    	    	    
173261	1989	    	    	    	    	    	    	    	    	    	    	    	    
173261	1990	    	    	    	    	    	    	    	    	    	    	    	    
173261	1991	  381	    	  127	    	    	    	    	    	    	    	    	  432
173261	1992	   76	  871	    	  135	    	    	    	    	    	    	    	  221
173261	1993	    	  668	   76	  190	    	    	    	    	    	    	    	  178