Year	Percent
1950	12.58614
1955	11.70421
1960	13.6638
1965	13.37149
1970	13.12266
1975	13.2203
1980	13.41535
1985	13.7778
1990	14.01121
1995	13.7802
2000	13.79539
2005	13.70556
2010	12.62669
2015	10.99318
2020	9.20798
2025	8.71625
2030	8.21116
2035	7.55611
2040	6.79796
2045	6.17009
2050	5.76935
2055	5.47568
2060	5.21908
2065	4.97107
2070	4.75237
2075	4.59012
2080	4.4874
2085	4.43955
2090	4.41539
2095	4.3965
2100	4.37647