Year	Percent
1950	22.09033
1955	22.85146
1960	20.8514
1965	21.89826
1970	22.53942
1975	23.0213
1980	25.10205
1985	23.8357
1990	23.18372
1995	24.2325
2000	25.16851
2005	25.70911
2010	27.72767
2015	28.06644
2020	28.86809
2025	29.87487
2030	29.52756
2035	27.96408
2040	26.02691
2045	25.4424
2050	24.16887
2055	24.04327
2060	24.05624
2065	24.01498
2070	23.5819
2075	23.40527
2080	23.33317
2085	23.32814
2090	23.34124
2095	23.28245
2100	23.10074