Mexico

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Year Electoral
System
Family
Electoral
System
for
National
Legislature
Number
of
tiers
Legislative
size
(directly
elected)
Legislative
size
(Voting
members)
Electoral
system
for
the
president
2015 Mixed MMP 2 500 500 FPTP
2012 Mixed MMP 2 500 500 FPTP
2009 Mixed MMP 2 500 500 FPTP
2006 Mixed MMP 2 500 500 FPTP
2003 Mixed MMP 2 500 500 FPTP
2000 Mixed MMP 2 500 500 FPTP
1997 Mixed MMP 2 500 500 FPTP
1994 Mixed Parallel 2 500 500 FPTP
1991 Mixed MMP 2 500 500 FPTP