# Years Size Links
indep 1951โ€“1964 33.6%
PPP 1951โ€“1961 35.8%
PLP 1982โ€“1987 27.1%
SLC 1951โ€“2011 66.5%
SLPUF 1969โ€“1969 5.8%
UWP 1964โ€“2011 58.6%