Table 1. May Water Index Figures by Strata for North Dakota, 
South Dakota and Minnesota - 1958 and 1959 
Percent 
State Stratum 1958 1959 Change 
North Dakota 
East 30,910 15,552 - 50 
Central 180,520 79, 344 - 56 
West 49,710 27» 54h - bs 
Sub~Total 261,140 122, 4.40 - 53 
South Dakota 
East 60, 809 37,005 - 39 
Central 139,190 29 , 887 - 79 
West 69,450 41,168 Eel 
Sub-Total 269,539 108, 060 - 60 
Minnesota | 
N. W. 110,235 49, 540 - 55 
S. We 204,262 60,249 oe, ee 
Sub-Total 314,497 109,789 - 65 
GRAND TOTAL 845,176 340,289 - 60 

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