Year	Percent
1950	8.67152
1955	8.0947
1960	7.87911
1965	7.34184
1970	7.27325
1975	7.30678
1980	7.27798
1985	7.50883
1990	8.8593
1995	9.97087
2000	10.75515
2005	12.29387
2010	15.24378
2015	18.45564
2020	22.11509
2025	25.78151
2030	28.56337
2035	30.94411
2040	33.16029
2045	35.49669
2050	36.4253
2055	37.78826
2060	40.79586
2065	41.83241
2070	41.55034
2075	41.97017
2080	42.41677
2085	42.99874
2090	43.4821
2095	43.57765
2100	43.39468