Registered voters represent a much smaller share of potential voters in the U.S. than just about any other OECD country. Census Bureau report shows only about 64% of the U.S. voting-age population were registered in 2016, compared with Slovakia ( 99%), Sweden ( 94%), Canada (93%), UK ( 92%) and U.S. (64%) respectively. Voters
Luxembourg also has a low rate (54%), although it represents something of a special case because nearly half of the tiny country’s population is foreign born.