Year	Percent
1950	14.63173
1955	14.65354
1960	14.46427
1965	14.1675
1970	13.60716
1975	12.86852
1980	12.16209
1985	11.47283
1990	10.81788
1995	11.04979
2000	11.30617
2005	11.99971
2010	12.52673
2015	11.73484
2020	11.45906
2025	12.10229
2030	13.35692
2035	14.65024
2040	15.18858
2045	15.41987
2050	15.96292
2055	16.90668
2060	18.20782
2065	19.34529
2070	19.98359
2075	20.42388
2080	20.91586
2085	21.57373
2090	22.28363
2095	22.84944
2100	23.19616