Politically, Oslo has long been more divided than the rest of Norway. The Norwegian Labour Party became large very early, whereas people with normal incomes often voted for the Conservative Party if they worked in offices or in the public sector. In the 1906 election, the Conservative Party and the Labour Party had a total of 86% of the votes, compared to 49% in the entire country of Norway, and this two-party dominance continued strong for the most of the 20th century. The mayors of Oslo from 1900 to 2009 have been from these two parties, with the exception of short interim periods.
