American citizens who are 18 years or older have the right to vote in US general elections. However, it is the voter’s choice whether or not to exercise that right. This is in contrast to countries where voting is compulsory. In Australia, for example, under federal electoral law, all eligible citizens are required to vote in federal elections or pay a $20 penalty. Australia’s voter turnout percentages top 80%.
So what are the voter turnout percentages in the US? Does the voter turnout process exhibit normal or special cause variation? Let’s look at a control chart of voter turnout rates since 1960 (which was the first year that all 50 states were eligible to vote in the presidential election) to find the answers. Does it give any insight to what our 2016 election holds?