Year	Percent
1950	9.49191
1955	8.62576
1960	7.54225
1965	6.9551
1970	6.75645
1975	6.66664
1980	6.58632
1985	7.08553
1990	9.21256
1995	9.48733
2000	10.35645
2005	10.73519
2010	11.85179
2015	11.46469
2020	13.10754
2025	16.19463
2030	19.03501
2035	21.11991
2040	23.58216
2045	27.17231
2050	31.18587
2055	35.07056
2060	37.86596
2065	39.39148
2070	39.37699
2075	39.40156
2080	39.31358
2085	39.82417
2090	40.48405
2095	40.79167
2100	40.74204