Increases in population over 20 percent were as follows: California 48 percent; Nevada 78 percent; Arizona 73 percent; Utah 29 percent; Colorado 32 percent; New Mexico 39 percent; Texas 24 percent; Louisiana 21 percent; Michigan 22 percent; Ohio 22 percent; Maryland 32 percent; Delaware 40 percent; New Jersey 25 percent; Connecticut 26 percent. Increase in population under 20 percent were as follows: Washington 19 percent; Oregon 16 percent; Idaho 13 percent; Montana 14 percent; Wyoming 13 percent; North Dakota 2 percent; South Dakota 4 percent; Nebraska 6 percent; Kansas 14 percent; Minnesota 14 percent; Wisconsin 15 percent; Illinois 15 percent; Missouri 9 percent; Mississippi 1 percent; Alabama 6 percent; Georgia 14 percent; Virginia 19 percent; North Carolina 12 percent; South Carolina 12 percent; New York 13 percent; Maine 6 percent; Vermont 3 percent; New Hampshire 13 percent. Decrease in population was Arkansas minus 6 percent and West Virginia minus 7 percent. 1947 interstate highway plan was spread all across U S A. Major Sun belt cities were New Orleans, Houston, San Antonio, Miami, Tucson, Phoenix, Las Vegas, Los Angeles, San Diego, Dallas, Atlanta, and Albuquerque.