Table:
text: National Democratic Party of Germany
Election results and current representation
Federal Parliament (Bundestag)
Election_year _of_constituency_votes_1 _of_constituency_votes_2 __3 _of_party_list_votes_4 _of_party_list_votes_5 __6 _of_overall_seats_won_
1965 587216 1.8 1.8 664193 2.0 2.0 0 / 518
1969 1189375 3.6 1.8 1422010 4.3 2.3 0 / 518
1972 194389 0.5 3.1 207465 0.6 3.7 0 / 518
1976 136.023 0.4 0.1 122661 0.3 0.3 0 / 518
1980    68096 0.2 0.1 0 / 497
1983 57112 0.1 0.3 91095 0.2 0 0 / 498
1987 182880 0.5 0.4 227054 0.6 0.4 0 / 497
1990 190105 0.4 0.1 145776 0.3 0.3 0 / 662
1998 45043 0.1 0.3 126571 0.3 0 0 / 669
2002 103209 0.1 0.1 215232 0.4 0.1 0 / 603

text: National Democratic Party of Germany
Election results and current representation
Federal Parliament (Bundestag)
Election_year _of_constituency_votes_1 _of_constituency_votes_2 __3 _of_party_list_votes_4 _of_party_list_votes_5 __6 _of_overall_seats_won_
2005 857.777 1.8 1.6 748568 1.6 1.2 0 / 614
2009 768442 1.8 0 635525 1.5 0.1 0 / 620
2013 634842 1.5 0.3 560660 1.3 0.2 0 / 630

text: National Democratic Party of Germany
Election results and current representation
Federal Parliament (Bundestag)
Election_year _of_constituency_votes_1 _of_constituency_votes_2 __3 _of_party_list_votes_4 _of_party_list_votes_5 __6 _of_overall_seats_won_
1965 587216 1.8 1.8 664193 2.0 2.0 0 / 518
1969 1189375 3.6 1.8 1422010 4.3 2.3 0 / 518
1972 194389 0.5 3.1 207465 0.6 3.7 0 / 518
1976 136.023 0.4 0.1 122661 0.3 0.3 0 / 518
1980    68096 0.2 0.1 0 / 497
1983 57112 0.1 0.3 91095 0.2 0 0 / 498
1987 182880 0.5 0.4 227054 0.6 0.4 0 / 497
1990 190105 0.4 0.1 145776 0.3 0.3 0 / 662
1998 45043 0.1 0.3 126571 0.3 0 0 / 669
2002 103209 0.1 0.1 215232 0.4 0.1 0 / 603

text: National Democratic Party of Germany
Election results and current representation
Federal Parliament (Bundestag)
Election_year _of_constituency_votes_1 _of_constituency_votes_2 __3 _of_party_list_votes_4 _of_party_list_votes_5 __6 _of_overall_seats_won_
2005 857.777 1.8 1.6 748568 1.6 1.2 0 / 614
2009 768442 1.8 0 635525 1.5 0.1 0 / 620
2013 634842 1.5 0.3 560660 1.3 0.2 0 / 630

Question: Which election year of the National Democratic Party of Germany had the lowest proportion of party list votes?