Year	Percent
1950	10.6485
1955	10.75866
1960	10.60236
1965	9.57522
1970	10.11269
1975	10.17723
1980	10.13973
1985	10.1524
1990	10.40014
1995	10.69963
2000	10.8104
2005	10.40267
2010	10.00327
2015	10.48526
2020	10.81691
2025	10.64596
2030	10.30139
2035	10.08373
2040	9.91713
2045	9.73006
2050	9.49967
2055	9.23542
2060	8.95173
2065	8.67265
2070	8.41032
2075	8.15093
2080	7.91216
2085	7.66132
2090	7.41221
2095	7.17291
2100	6.9383