# Years Size Links
AM 2000–2000 13.6%
PAN 1946–2000 9.5%
PARM 1958–1991 6.0%
PRD 1991–1997 8.2%
PRM 1946–1946 95.9%
PFCRN 1985–1991 7.6%
PPS 1949–1991 7.4%
PRI 1949–2000 96.6%