"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
171516	1970	    	    	    	    	    	    	    	    	    	    	    	    
171516	1971	    	    	    	    	    	    	    	    	    	    	    	    
171516	1972	    	    	    	    	    	    	    	    	    	    	    	    
171516	1973	    	    	    	    	    	    	    	    	    	    	    	    
171516	1974	    	    	    	    	    	    	    	    	    	    	    	    
171516	1975	    	    	    	    	    	    	    	    	    	    	    	    
171516	1976	    	    	    	    	    	    	    	    	    	    	    	    
171516	1977	    	    	    	    	    	    	    	    	    	    	    	    
171516	1978	    	    	    	    	    	    	    	    	    	    	    	    
171516	1979	    	    	    	    	    	    	    	    	    	    	    	    
171516	1980	    	    	    	    	    	    	    	    	    	    	    	    
171516	1981	    	    	    	    	    	    	    	    	    	    	    	    
171516	1982	    	    	    	    	    	    	    	    	    	    	    	    
171516	1983	    	    	    	    	    	    	    	    	    	    	    	    
171516	1984	    	    	    	    	    	    	    	    	    	    	    	    
171516	1985	    	    	    	    	    	    	    	    	    	    	    	    
171516	1986	    	    	    	    	    	    	    	    	    	    	    	    
171516	1987	    	    	    	    	    	    	    	    	    	    	    	    
171516	1988	    	    	    	    	    	    	    	    	    	    	    	    
171516	1989	    	    	    	    	    	    	    	    	    	   44	  115	   46
171516	1990	   94	   57	   52	   59	   80	  186	  107	  142	   74	  262	   91	  104
171516	1991	   62	   38	  113	  106	   35	    	    	    	    	    	    	    
171516	1992	    	    	    	    	   42	  154	  117	   94	   81	   70	   66	   36
171516	1993	   60	   74	   60	  148	   89	  152	  119	   90	  157	  109	   69	   95