"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
173417	1970	    	    	    	    	    	    	    	    	    	    	    	    
173417	1971	    	    	    	    	    	    	    	    	    	    	    	    
173417	1972	    	    	    	    	    	    	    	    	    	    	    	    
173417	1973	    	    	    	    	    	    	    	    	    	    	    	    
173417	1974	    	    	    	    	    	    	    	    	    	    	    	    
173417	1975	    	    	    	    	    	    	    	    	    	    	    	    
173417	1976	    	    	    	    	    	    	    	    	    	    	    	    
173417	1977	    	    	    	    	    	    	    	    	    	    	    	    
173417	1978	    	    	    	    	    	    	    	    	    	    	  305	  635
173417	1979	  965	  279	   25	  406	    	    	    	    	    	  114	    	   76
173417	1980	  102	  279	  381	    	    	    	    	    	    	    	  305	    
173417	1981	    	    	    	    	    	    	    	    	    	    	  127	  787
173417	1982	  889	  381	  406	  279	    	    	    	    	    	    	    	    
173417	1983	    	  493	  112	   91	    	    	    	    	    	    	  302	  330
173417	1984	  434	  231	  724	    	    	    	    	    	    	    	    	  660
173417	1985	  368	  224	  203	    	    	    	    	    	    	    	  137	  394
173417	1986	  711	  330	  279	   64	    	    	    	    	    	    	  318	  178
173417	1987	  998	  198	  439	   89	    	    	    	    	    	    	  406	  572
173417	1988	  538	  549	  109	  254	    	    	    	    	    	   76	   64	  292
173417	1989	  472	  447	  506	   23	    	    	    	    	    	   13	  361	  551
173417	1990	  932	  470	  224	    	    	    	    	    	    	    	    	  406
173417	1991	  617	  173	  381	   38	    	    	    	    	    	    	   13	  610
173417	1992	  102	  604	   25	   64	    	    	    	    	    	    	   25	  114
173417	1993	  160	  965	  965	  323	    	    	    	    	    	    	   51	   61