year of election candidates elected # of seats available # of votes % of popular vote
year of election
candidates elected
# of seats available
# of votes
% of popular vote
number
number
number
number
number
number number number number percentage
1963 7 108 865507 15.5%
how many more seats were available in 1975 than 1963 ?
WRB JJ JJR NNS VBD-AUX JJ IN CD IN CD .
17
select ( select c3_number from w where c1_number = 1975 ) - ( select c3_number from w where c1_number = 1963 )