Figure 3. A Comparison of Trends in Breeding-population 
40 
Ww Ww 
oO wm 
™N 
1S) 
Breeding-population Index (millions) 
° nan oO 
wi 

Indexes for Hunting and Nonhunting States 
within Management Units. 
CENTRAL UNIT 
Hunting States 



EASTERN. UNIT 
Hunting States 
ee ean enn TSN SERS SS CT nan a a a Nonhunting States 

1953 1954 1955 1956 1957 1958 1959 1960 1961 
