The parliament is a unicameral assembly with 349 members who are chosen every four years in general elections. To become an MP, a person must be entitled to vote (i.e. be a Swedish citizen, be at least 18 years old and be or have been resident in Sweden) and must be nominated by a political party. The MPs are elected by proportionality in constituencies across the nation. To decide which candidate will be elected the modified Sainte-Laguë method is used. This method usually but not always gives an accurate result in proportion to cast votes. In the 2014 general election the centre-right coalition government got one less MP than the overall opposition, despite more votes in total. To get a more proportional result 39 MPs are elected at compensation mandate ("Utjämningsmandat") and those MPs, therefore, do not represent their own constituency.