Maltese legislation recognises both civil and canonical (ecclesiastical) marriages. Annulments by the ecclesiastical and civil courts are unrelated and are not necessarily mutually endorsed. Malta voted in favour of divorce legislation in a referendum held on 28 May 2011. Abortion in Malta is illegal. A person must be 16 to marry. The number of brides aged under 25 decreased from 1471 in 1997 to 766 in 2005; while the number of grooms under 25 decreased from 823 to 311. There is a constant trend that females are more likely than males to marry young. In 2005 there were 51 brides aged between 16 and 19, compared to 8 grooms.