The Green Party of Ontario (GPO) became an officially registered political party in 1983, in Ontario, Canada, and has been developing in size and sophistication since that time, expanding its membership and rising in the polls. The GPO has increased the number of candidates in successive provincial elections. Elections Ontario records that in the 1999 provincial election, the GPO fielded 58 candidates, and became the fourth largest party in the province. In 2003, the party fielded its first nearly-full slate, 102 out of 103 candidates, and received 2.8% of the vote. In 2007, the party fielded a full slate of 107 candidates, receiving 8.06% and over 350,000 votes.