"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
270040	1970	    	    	    	    	    	    	    	    	    	    	    	    
270040	1971	    	    	    	    	    	    	    	    	    	    	    	    
270040	1972	    	    	    	    	    	    	    	    	    	    	    	    
270040	1973	    	    	    	    	    	    	    	    	    	    	    	    
270040	1974	    	    	    	    	    	    	    	    	    	    	    	    
270040	1975	    	    	    	    	    	    	    	    	    	    	    	    
270040	1976	    	    	    	    	    	    	    	    	    	    	    	    
270040	1977	    	    	    	    	    	    	    	    	    	    	    	    
270040	1978	    	    	    	    	    	    	    	    	    	    	    	    
270040	1979	    	    	    	    	    	    	    	    	    	    	    	    
270040	1980	    	    	    	    	    	    	    	    	    	    	    	    
270040	1981	    	    	    	    	    	    	    	    	    	    	    	    
270040	1982	    	    	    	    	    	    	    	    	    	    	    	    
270040	1983	    	    	    	    	    	    	    	    	    	    	    	    
270040	1984	    	    	    	    	    	    	    	    	    	    	    	    
270040	1985	    	    	    	    	    	    	    	    	    	    	    	    
270040	1986	    	    	    	    	    	    	    	    	    	    	    	    
270040	1987	    	    	    	    	    	    	    	    	    	    	    	    
270040	1988	    	    	    	    	    	    	    	    	    	    	    	    
270040	1989	    	    	    	    	    	    	    	    	    	    	    	    
270040	1990	    	    	    	    	    	    	    	    	    	    	    	    
270040	1991	    	    	    	    	    	   62	   59	  220	  119	  125	   85	   89
270040	1992	   75	   52	   81	   76	   52	   90	  117	   89	  106	   75	  104	   46
270040	1993	   52	   82	   91	  124	   22	   96	  116	   76	   82	   70	  129