Like most rural areas throughout Missouri, voters in Dunklin County generally adhere to socially and culturally Conservatism principles but are more moderate or Populism on economic issues, typical of the Dixiecrat philosophy. In 2004, Missourians voted on Missouri Constitutional Amendment 2 (2004)—it overwhelmingly passed Dunklin County with 87.57 percent of the vote. The initiative passed the state with 71 percent of support from voters as Missouri became the first state to ban same-sex marriage. In 2006, Missourians voted on Missouri Constitutional Amendment 2 (2006)—it failed in Dunklin County with 53.70 percent voting against the measure. The initiative narrowly passed the state with 51 percent of support from voters as Missouri became one of the first states in the nation to approve Embryonic stem cell. Despite Dunklin County’s longstanding tradition of supporting socially conservative platforms, voters in the county have a penchant for advancing Populism causes like increasing the minimum wage. In 2006, Missourians voted on a proposition (Proposition B) to increase the minimum wage in the state to $6.50 an hour—it passed Dunklin County with 79.42 percent of the vote. The proposition strongly passed every single county in Missouri with 78.99 percent voting in favor as the minimum wage was increased to $6.50 an hour in the state. During the same election, voters in five other states also strongly approved increases in the minimum wage.

Answer this question based on the article: How many states in total voted to increase minimum wage in the 2006 election?
6