 Bustamante, reversing his previously supportive position on the issue, warned of the financial implications of membership – Jamaica was responsible for 43 percent of its own financing – and an inequity in Jamaica's proportional representation in the federation's House of Assembly.Manley's PNP favoured staying in the federation, but he agreed to hold a referendum in September 1961 to decide on the issue.When 54 percent of the electorate voted to withdraw, Jamaica left the federation, which dissolved in 1962 after Trinidad and Tobago also pulled out.