Year	Percent
1950	16.98318
1955	15.76921
1960	15.2143
1965	15.998
1970	16.06753
1975	16.05355
1980	17.18204
1985	17.95907
1990	18.6584
1995	20.767
2000	23.40444
2005	27.36331
2010	29.50357
2015	29.9628
2020	26.16767
2025	22.10113
2030	19.11723
2035	17.27286
2040	19.06018
2045	21.35825
2050	23.95841
2055	25.46583
2060	25.12798
2065	23.92182
2070	22.39971
2075	22.61374
2080	22.61634
2085	22.68862
2090	22.43827
2095	21.91368
2100	21.40227