Year	Percent
1950	21.4541
1955	22.16046
1960	22.05722
1965	22.22271
1970	22.78829
1975	23.14656
1980	22.9988
1985	22.16787
1990	21.27601
1995	20.77941
2000	21.37248
2005	22.4767
2010	23.00669
2015	23.84007
2020	24.48225
2025	24.52385
2030	25.2101
2035	25.79356
2040	25.99948
2045	26.40417
2050	26.28643
2055	25.67143
2060	25.20284
2065	24.93383
2070	24.72113
2075	24.50713
2080	24.22375
2085	23.9178
2090	23.64733
2095	23.4389
2100	23.28048