Final answer:
Belgium and Turkey have the highest voter turnout, with VAP turnouts of 87% and 86%. The U.S. has a lower voter turnout at around 54%. Voter registration policies and compulsory voting laws are key factors that influence these numbers.
Step-by-step explanation:
The nations with the highest voter turnout due to compulsory voting laws are Belgium and Turkey, with Voting Age Population (VAP) turnouts of 87 percent and 86 percent, respectively. In contrast, the voter turnout in the United States is around 54 percent. Factors influencing low voter turnout in the U.S. include the absence of mandatory voting and the fact that registration is not automatic. Nations like Sweden and Germany automatically register their voters, leading to higher turnouts of 83 percent and 66 percent, respectively. For the U.S. to increase voter turnout, potential strategies could involve adopting similar practices and addressing other barriers to voting.