This was the first general election where 18-year-olds had the right to vote. Therefore, despite 1.1 million more people voting in 1970 compared to 1966, turnout actually fell by 3%. This 72% turnout was the lowest since the 1935 general election and compared with a post-War high of 84% in 1950. Professor Richard Rose described the low turnout, which he noted was "one of the lowest since the introduction of the democratic franchise", as surprising to politician and pollsters. Changes to electoral law as part of the Representation of the People Act 1969 had made postal voting easier and polling stations were open an hour later than in past elections, and this would have been expected to improve turnout. On top of this it was reported by Rose that an estimated 25% of 18- to 21-year-olds who were now eligible to vote had not put their names on the electoral register, meaning the turnout was even lower than the percentage figure suggested. Rose also argued that the turnout figures in Britain were "now among the lowest in the Western world." Because the previous election had been in 1966, some people had not had their chance to vote in a general election until the age of 25. Labour's number of votes, 12.2 million, was ironically the same amount they had needed to win in 1964. The Conservative vote surge cost Labour in many marginal seats. Rose suggested the absolute fall in the number of Labour votes suggested that many of the party's supporters had decided to abstain. He also noted that the Labour Party's local organisation was poorer than that of the Conservatives, but did not feel this was a significant factor in Labour supporters failing to come out to vote for the Party given that this organisational difference had been the case in past elections without having this effect. For the Liberals, a small 1% drop in their vote share saw them lose 6 seats, 3 of which were held by the narrowest of margins.