Party	1979	1980	1985	1989	1993	(a)1997
ADN AP APIN ARBOL ASD	14.9% — 4.1% — —	16.8% — — — —	32.8% — — — —	25.2% — — — —	— 21.1% — 1.9% 1.8%	22.3% — — — —
CONDEPA EJE FDR FPU FSB	— — — — —	— — 3.0% — 1.6%	— — — 2.5% 1.3%	12.3% — — — 0.7%	14.3% 1.1% — — 1.3%	17.2% 0.8% — — —
IU MBL MIR MITKA MITKA-1	— — — 1.9% —	— — — 1.2% 1.3%	0.7% — 10.2% — —	8.0% — 21.8% — —	1.0% 5.4% — — —	3.7% 3.1% 16.8% — —
MNR MNRI MNRV MRTKL PDC	35.9% — — — —	20.1% — — — —	30.4% 5.5% 4.8% 2.1% 1.6%	25.6% — — 1.6% —	35.6% — — — —	18.2% — — — —
PRA PS-1 UCS UDP Others	— 4.8% — 36.0% 2.4%	2.8% 8.7% — 38.7% 5.6%	— 2.6% — — 5.5%	— 2.8% — — 1.8%	— — 13.8% — 2.9%	— — 16.1% — 1.9%
Valid votes Spoiled votes Voter turnout Votes/VAP	86.8% 13.2% 90.5% 69.1%	87.9% 12.1% 74.3% 59.1%	87.0% 13.0% 82.0% 65.2%	90.0% 10.0% 73.6% 51.0%	95.2% 4.8% 72.2% 50.0%	93.4% 6.2% 71.4% 64.5%

Source: Corte Nacional Electoral (a)Bolivia's electoral system used List-PR on a single ballot for presidential and legislative elections. The 1995 Constitution modified this system to a mixed member plurality system. Ballots since 1997 have two parts: one for the plurinominal lists and another for the uninominal single-member distric candidates. Figures for subsequent elections reflect votes for the plurinominal list.