Map of the U. S showing changes in population from 1950 to 1970. A more than 5 percent gain occurred in MD, DE, FL, CO, AZ, UT, NV, CA, AL, HI. A 31 to 50% gain occurred in NH, NJ, VA, GA, OH, MI, ID, LA, TX, NM, WA, OR. A 21 to 30% gain occurred in MA, RI, NY, CT, NC, SC, IL, WI, MN. A 6 to 20% gain occurred in ME, VT, PA, TN, KY, AL, MO, IW, NB, KA, OK, WY, MT. A 5% decrease occurred in WV, MS, AK, ND, SD. © 2012 The Exploration Company According to this map, what region of the United States experienced the greatest growth in population during the 1950s and 1960s?