year	incvote	dispvote1	dispvote2	nextyr	tenure
1956	57.80	1.60	3.70	36.00	4
1960	49.90	1.65	2.26	35.00	8
1964	61.30	4.74	1.78	37.00	4
1968	49.60	2.91	3.31	33.00	8
1972	61.79	1.61	2.39	38.00	4
1976	48.90	2.03	0.68	32.00	8
1980	44.70	-1.26	1.59	26.00	4
1984	59.20	2.67	1.67	37.33	4
1988	53.90	1.73	-0.05	36.33	8
1992	46.50	2.10	-1.03	36.33	12
1996	54.74	2.07	2.33	35.67	4