Year	Percent
1950	28.42609
1955	28.76627
1960	28.8312
1965	28.75603
1970	28.46478
1975	27.65767
1980	27.4145
1985	26.5013
1990	26.27337
1995	26.90372
2000	27.76851
2005	28.38002
2010	28.48996
2015	28.14766
2020	27.9412
2025	28.2762
2030	29.06739
2035	30.08197
2040	30.83444
2045	31.22358
2050	31.41556
2055	31.47598
2060	31.55011
2065	31.57385
2070	31.47496
2075	31.2647
2080	30.96065
2085	30.62242
2090	30.28363
2095	29.92298
2100	29.54877