1900=5,58; 1901/04=5,213; 1905=5,97; 1906/07=5,120; 1908=5,143; 1909=5,155; 1910=5,183; 1911=5,213; 1912=6,22; 1913=6,53; 1914=6,87; 1915=6,125; 1916/17=6,162; 1918=7,5; 1921=7,91; 1922=7,127; 1923=7,164; 1924=7,194 von: Norwegen: [Norges offisielle statistikk <Oslo, 1885 - 1979>] (ISSN: 0300-5585)