Year	Percent
1950	8.88819
1955	12.28501
1960	13.12125
1965	13.34465
1970	12.86042
1975	13.06227
1980	11.80107
1985	11.26343
1990	10.83656
1995	11.38937
2000	12.29737
2005	11.8611
2010	11.86006
2015	11.54114
2020	10.68846
2025	9.89837
2030	9.4531
2035	9.23335
2040	9.02329
2045	8.73909
2050	8.36652
2055	7.97702
2060	7.64195
2065	7.3892
2070	7.18221
2075	6.95788
2080	6.70342
2085	6.44192
2090	6.21422
2095	6.01667
2100	5.85837