Year	Percent
1950	10.26926
1955	8.36608
1960	7.59086
1965	7.09623
1970	6.9199
1975	6.54408
1980	6.03858
1985	5.47755
1990	5.53468
1995	5.19472
2000	4.98426
2005	4.96695
2010	4.91867
2015	4.9541
2020	5.08335
2025	5.32382
2030	5.63744
2035	5.98729
2040	6.39506
2045	6.87088
2050	7.43581
2055	8.11018
2060	8.8599
2065	9.65412
2070	10.52052
2075	11.42192
2080	12.31602
2085	13.21647
2090	14.12713
2095	15.04612
2100	15.98138