"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
270100	1970	    	    	    	    	    	    	    	    	    	    	    	    
270100	1971	    	    	    	    	    	    	    	    	    	    	    	    
270100	1972	    	    	    	    	    	    	    	    	    	    	    	    
270100	1973	    	    	    	    	    	    	    	    	    	    	    	    
270100	1974	    	    	    	    	    	    	    	    	    	    	    	    
270100	1975	    	    	    	    	    	    	    	    	    	    	    	    
270100	1976	    	    	    	    	    	    	    	    	    	    	    	    
270100	1977	    	    	    	    	    	    	   52	  100	  158	  194	   96	  159
270100	1978	  202	   60	   60	   78	  109	  103	   63	   73	   30	   87	   63	  138
270100	1979	  260	   72	   99	  118	  147	   26	  101	  142	   91	  130	   93	   72
270100	1980	   18	   25	  133	  137	   29	  109	   95	   73	   80	  113	  101	   32
270100	1981	   18	  224	   36	   89	   94	   91	  177	  112	  133	  194	   92	  153
270100	1982	   96	   77	   53	  120	   96	  202	   78	  149	   57	   40	   96	   32
270100	1983	  114	    	    	  158	  178	   64	   68	   89	   35	  107	  248	  156
270100	1984	   54	  115	   84	  115	  253	  146	  138	   45	   26	  126	   70	   78
270100	1985	   28	   88	   73	   36	   61	   70	   50	  135	  116	   87	  126	   46
270100	1986	  131	   55	  105	   69	   91	  145	  142	   63	   67	   61	  119	   94
270100	1987	    	    	    	    	    	    	    	    	    	    	    	    
270100	1988	    	    	    	    	    	    	    	    	    	    	    	    
270100	1989	    	    	    	    	    	    	    	    	    	    	    	    
270100	1990	    	    	    	    	    	    	    	    	    	    	    	    
270100	1991	    	    	    	    	    	    	    	    	    	    	    	    
270100	1992	    	    	    	    	    	    	    	    	    	    	    	    
270100	1993