"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
174193	1970	    	    	    	    	    	    	    	    	    	    	    	    
174193	1971	    	    	    	    	    	    	    	    	    	    	    	    
174193	1972	    	    	    	    	    	    	    	    	    	    	    	    
174193	1973	    	    	    	    	    	    	    	    	    	    	    	    
174193	1974	    	    	    	    	    	    	    	    	    	    	    	    
174193	1975	    	    	    	    	    	    	    	    	    	    	    	    
174193	1976	    	    	    	    	    	    	    	    	    	    	    	    
174193	1977	    	    	    	    	    	    	    	    	    	    	    	    
174193	1978	    	    	    	    	    	    	    	    	    	    	    	    
174193	1979	    	    	    	    	    	    	    	    	    	    	    	    
174193	1980	    	    	    	    	    	    	    	    	    	    	    	    
174193	1981	    	    	    	    	    	    	    	    	    	    	    	    
174193	1982	    	    	    	    	    	    	    	    	    	    	    	    
174193	1983	    	    	    	    	    	    	    	    	    	    	    	    
174193	1984	    	    	    	    	    	    	    	    	    	    	    	    
174193	1985	    	    	    	    	    	    	    	    	    	    	    	    
174193	1986	    	    	    	    	    	    	    	    	    	    	    	    
174193	1987	    	    	    	    	    	    	    	    	    	    	    	    
174193	1988	    	    	    	    	    	    	    	    	    	    	    	    
174193	1989	    	    	    	    	    	    	    	    	    	    	   51	  356
174193	1990	  381	  356	   25	    	    	    	    	    	    	    	    	  140
174193	1991	  318	   64	   38	    	    	    	    	    	    	    	    	  546
174193	1992	   13	  112	  406	  127	    	    	    	    	    	    	   13	   76
174193	1993	  287	  711	  826	   66