Year	Percent
1950	14.05727
1955	13.77082
1960	13.45118
1965	13.24863
1970	12.55538
1975	12.24949
1980	12.26322
1985	12.39016
1990	12.85038
1995	14.21824
2000	15.52659
2005	16.77233
2010	18.41345
2015	19.24228
2020	19.85626
2025	20.36914
2030	21.01072
2035	22.13692
2040	23.01582
2045	23.59762
2050	24.04772
2055	24.17562
2060	24.41242
2065	24.78333
2070	25.01907
2075	25.14213
2080	25.16557
2085	25.13432
2090	25.06489
2095	24.94846
2100	24.7827