"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
172700	1970	    	    	    	    	    	    	    	    	    	    	    	    
172700	1971	    	    	    	    	    	    	    	    	    	    	    	    
172700	1972	    	    	    	    	    	    	    	    	    	    	    	    
172700	1973	    	    	    	    	    	    	    	    	    	    	    	    
172700	1974	    	    	    	    	    	    	    	    	    	    	    	    
172700	1975	    	    	    	    	    	    	    	    	    	    	    	    
172700	1976	    	    	    	    	    	    	    	    	    	    	    	    
172700	1977	    	    	    	    	    	    	    	    	    	    	    	    
172700	1978	    	    	    	    	    	    	    	    	    	    	    	    
172700	1979	    	    	    	    	    	    	    	    	    	    	    	    
172700	1980	    	    	    	    	    	    	    	    	    	    	    	    
172700	1981	    	    	    	    	    	    	    	    	    	    	    	    
172700	1982	    	    	    	    	    	    	    	    	    	    	    	    
172700	1983	    	    	    	    	    	    	    	    	    	    	    	    
172700	1984	    	    	    	    	    	    	    	    	    	    8	   51	  864
172700	1985	  315	  353	  328	  328	    	    	    	    	    	   13	  287	  556
172700	1986	  871	  498	  513	  287	   43	    	    	    	    	    	  508	  330
172700	1987	 1046	  325	  498	  424	    8	    	    	    	    	   20	  589	  597
172700	1988	  480	  858	   99	  373	    	    	    	    	    	   89	  236	  396
172700	1989	  734	  569	  559	  168	    	    	    	    	    	   66	  378	  772
172700	1990	 1168	  635	  412	   25	    	    	    	    	    	    5	  310	  526
172700	1991	  932	  226	  566	   36	    	    	    	    	    	    	  193	  627
172700	1992	  160	  897	  130	  234	    	    	    	    	    	   13	  168	  226
172700	1993	  323	 1036	 1212	  516	    	    	    	    	    	   43	  218	  457