Kammala jumla mai zuwa: Jansen ta lashe na farko daga cikin wasanninta uku na Dutch a jere a kakar wasa ta 1977-78. Ta yi gasa a gasar zakarun Turai ta ISU sau biyar, ta gama 17 a gasar Turai ta 1978 a Strasbourg, Faransa; 18 a gasar 1978 ta Duniya a Ottawa, Ontario, Kanada; 20 a gasar Turai ta 1979 a Zagreb, Yugoslavia; 23 a gasar
1979 Duniya a Vienna, Austria; da 18th a 1980 Turai a Gothenburg, Sweden.