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1985 . 45 . 58,6 60 10 . (U.S. Bureau of the Census, 1986).
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, , , . , , . , 66 , 7 (,1968).
( ) .
1970 . 40 , 8 ( ), 4 2 (, , 1974). 1980 . 13,4, 12,8 4,3 (U.S. Bureau of the Census, 1981).
11-2. ( %)
U S Bureau of the Census, Curreit Populat-oa Reports, 1985, p 23
II. .
11.
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