Year	Percent
1950	9.55225
1955	9.51112
1960	9.49957
1965	12.51646
1970	14.78625
1975	15.72172
1980	14.83948
1985	17.6962
1990	15.37698
1995	15.5058
2000	14.61664
2005	14.6414
2010	15.21204
2015	14.71226
2020	14.05378
2025	13.19237
2030	12.60955
2035	12.18756
2040	11.74795
2045	11.26542
2050	10.80714
2055	10.3567
2060	9.94467
2065	9.5562
2070	9.21623
2075	8.90783
2080	8.61162
2085	8.30914
2090	8.03491
2095	7.76164
2100	7.51071