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. 1981 Sep;3(1):89–116.

Table J. Number of Users by Area of Residence.

Area of Residence Number of Users
United States 10,821,900
Northeast 2,827,800
 New England 697,400
  Maine 58,700
  New Hampshire 43,100
  Vermont 28,900
  Massachusetts 334,500
  Rhode Island 71,800
  Connecticut 160,400
 Mid Atlantic 2,130,400
  New York 1,062,600
  New Jersey 413,800
  Pennsylvania 654,000
North Central 2,713,500
 East North Central 1,805,600
  Ohio 467,800
  Indiana 237,900
  Illinois 467,500
  Michigan 397,400
  Wisconsin 235,000
 West North Central 907,900
  Minnesota 205,000
  Iowa 164,100
  Missouri 259,900
  North Dakota 40,000
  South Dakota 32,100
  Nebraska 75,300
  Kansas 131,500
South 3,278,400
 South Atlantic 1,664,300
  Delaware 25,700
  Maryland 135,200
  District of Columbia 31,700
  Virginia 177,000
  West Virginia 79,300
  North Carolina 221,200
  South Carolina 98,700
  Georgia 196,400
  Florida 699,100
 East South Central 585,800
  Kentucky 127,700
  Tennessee 183,400
  Alabama 158,500
  Mississippi 116,200
 West South Central 1,028,300
  Arkansas 131,700
  Louisiana 142,500
  Oklahoma 154,300
  Texas 599,800
West 1,996,400
 Mountain 412,600
  Montana 32,500
  Idaho 36,300
  Wyoming 12,700
  Colorado 109,800
  New Mexico 45,200
  Arizona 114,100
  Utah 39,100
  Nevada 22,900
 Pacific 1,583,800
  Washington 197,700
  Oregon 126,100
  California 1,223,600
  Alaska 4,200
  Hawaii 32,200