Year	Percent
1950	10.36149
1955	10.55067
1960	10.57103
1965	10.60537
1970	9.21993
1975	9.3561
1980	9.48816
1985	9.92737
1990	10.28448
1995	10.46625
2000	11.27737
2005	11.50518
2010	10.43608
2015	9.23686
2020	8.2444
2025	7.90567
2030	7.3469
2035	7.13605
2040	6.69418
2045	6.19061
2050	5.75887
2055	5.48469
2060	5.35221
2065	5.29317
2070	5.23052
2075	5.14179
2080	5.05434
2085	5.00685
2090	5.00772
2095	5.03089
2100	5.04085