Year	Percent
1950	11.35872
1955	11.13322
1960	10.94457
1965	11.84419
1970	11.83217
1975	11.76521
1980	12.07434
1985	12.59572
1990	12.86596
1995	13.13073
2000	12.84088
2005	12.43432
2010	11.94225
2015	11.73586
2020	12.06774
2025	12.21554
2030	11.63082
2035	11.06807
2040	10.63866
2045	10.34263
2050	10.09267
2055	9.80718
2060	9.47512
2065	9.11062
2070	8.76488
2075	8.46839
2080	8.20577
2085	7.9411
2090	7.67845
2095	7.41668
2100	7.14476