As a rule, it can be said that the larger the parties that apply voluntarily gender quotas, the higher the impact. For example, it was of paramount importance that the Labour Party, as the largest party in Norwegian politics, implemented such a quota in the 1985 elections for the first time. This led to a significant rise in the number of female representatives. The same can be said with regard to the British Labour party which increased its number of women candidates by introducing all-women shortlists in 1997. The adoption of a 40% quota by the Social Democratic Party of Croatia in 1996 constitutes another example since the party was responsible for a significant portion of women being elected to parliament. Similar effects are clearly visible in countries where predominant ruling parties adopt voluntary quotas, as has been the case in Mozambique, Namibia or South Africa.