Year	Percent
1950	27.59295
1955	26.65864
1960	25.4219
1965	25.14486
1970	24.35319
1975	24.99487
1980	25.70922
1985	23.38855
1990	25.52066
1995	23.65781
2000	24.05821
2005	22.36619
2010	22.34839
2015	22.5303
2020	22.88357
2025	24.26102
2030	25.86908
2035	27.36814
2040	28.27095
2045	28.88478
2050	29.48982
2055	30.10586
2060	30.69144
2065	31.17265
2070	31.52676
2075	31.72767
2080	31.78824
2085	31.71075
2090	31.49582
2095	31.19111
2100	30.78585