"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	    	    	    	    	    	    	    	    	    	   51	  457	  838
171516	1990	  902	  343	  229	  152	    	    	    	    	    	    	  483	  546
171516	1991	  813	  178	  635	  102	    	    	    	    	    	    	    	    
171516	1992	    	    	    	    	    	    	    	    	    	    	  140	  368
171516	1993	  305	  914	  775	  508	    	    	    	    	    	    	  152	  406