Year	Percent
1950	13.44573
1955	13.73158
1960	15.55508
1965	15.31713
1970	14.90462
1975	14.96356
1980	15.34013
1985	15.75217
1990	15.81325
1995	15.10999
2000	15.25141
2005	14.72884
2010	13.98945
2015	12.3597
2020	11.48444
2025	10.88176
2030	10.23335
2035	9.55842
2040	8.89752
2045	8.29803
2050	7.76713
2055	7.30746
2060	6.90327
2065	6.55312
2070	6.22844
2075	5.95353
2080	5.71802
2085	5.53319
2090	5.37746
2095	5.25068
2100	5.13785