Year	Percent
1950	11.49859
1955	11.68867
1960	7.60458
1965	6.35136
1970	9.86402
1975	10.76607
1980	11.37306
1985	10.62021
1990	10.24261
1995	10.30535
2000	11.38175
2005	12.33733
2010	11.43864
2015	10.30827
2020	8.93057
2025	9.6682
2030	10.4163
2035	10.07351
2040	9.30151
2045	8.59007
2050	8.35416
2055	8.43326
2060	8.40442
2065	8.05469
2070	7.5673
2075	7.18254
2080	6.98975
2085	6.86727
2090	6.68968
2095	6.4078
2100	6.12716