Year	Percent
1950	11.55635
1955	13.49744
1960	15.12485
1965	15.57467
1970	15.85805
1975	16.03936
1980	16.43306
1985	16.54253
1990	16.54244
1995	15.93464
2000	14.52753
2005	14.78917
2010	14.5606
2015	14.24444
2020	13.12188
2025	12.42997
2030	11.83524
2035	11.32415
2040	10.80009
2045	10.2355
2050	9.68161
2055	9.19619
2060	8.74828
2065	8.33507
2070	7.94811
2075	7.57791
2080	7.21393
2085	6.8907
2090	6.61947
2095	6.3759
2100	6.16279