Year	Percent
1950	7.42014
1955	6.51209
1960	5.90968
1965	5.47118
1970	5.1532
1975	4.76898
1980	4.59404
1985	4.8058
1990	5.30897
1995	5.77881
2000	6.16048
2005	6.63359
2010	6.99006
2015	8.06569
2020	9.95701
2025	12.21536
2030	14.53612
2035	17.07545
2040	21.37918
2045	27.79069
2050	33.576
2055	36.43737
2060	37.08487
2065	37.38484
2070	38.49922
2075	39.87368
2080	40.5644
2085	40.48829
2090	40.02407
2095	39.74099
2100	39.88383