Year	Percent
1950	9.05458
1955	9.61518
1960	13.06582
1965	14.66073
1970	15.22001
1975	14.21611
1980	13.67279
1985	13.31511
1990	14.14038
1995	15.28462
2000	14.0261
2005	12.65183
2010	10.86713
2015	11.38356
2020	11.91716
2025	11.25894
2030	10.25903
2035	9.37244
2040	8.97511
2045	8.88485
2050	8.69863
2055	8.22836
2060	7.65766
2065	7.20553
2070	6.94749
2075	6.7661
2080	6.54569
2085	6.23813
2090	5.93727
2095	5.69954
2100	5.54623