year	incvote	term	prespop	GDPgrow
1948	52.3	1	39	1.8
1952	44.6	1	32	-0.2
1956	57.8	0	69	0.5
1960	49.9	1	49	0.4
1964	61.3	0	74	1.1
1968	49.6	1	40	1.3
1972	61.8	0	56	2.2
1976	48.9	1	45	1.1
1980	44.7	0	21	-2.3
1984	59.2	0	52	1.8
1988	53.9	1	51	0.8
1992	46.6	1	31	0.4
1996	54.6	0	56	1.6