Year	Percent
1950	11.13916
1955	11.08238
1960	11.52133
1965	12.31437
1970	13.13838
1975	13.75424
1980	14.10561
1985	12.97599
1990	11.13433
1995	11.0348
2000	11.04812
2005	10.21336
2010	8.98965
2015	7.30129
2020	5.92931
2025	5.67248
2030	5.44777
2035	5.16838
2040	4.88964
2045	4.58492
2050	4.31418
2055	4.16694
2060	4.13899
2065	4.15899
2070	4.15826
2075	4.13551
2080	4.11691
2085	4.13315
2090	4.2008
2095	4.28323
2100	4.34729