The principal political party in the Cornish Nationalist movement is Mebyon Kernow which labels itself as a 'centre-left, green and decentralist party' and has close association with its sister party Plaid Cymru in Wales. Mebyon Kernow's membership is calculated at around 1,000 members across Cornwall. In 1979, in the first elections to the European Parliament, Mebyon Kernow won almost 10% (over 10,000 votes) of the vote in the Cornwall seat. This reflected a decade of steady growth for the party. MK continues to contest parliamentary seats and also local government seats. In the 2015 general election, Mebyon Kernow fielded candidates in all of the constituencies in Cornwall.