Year	Percent
1950	27.08449
1955	28.08389
1960	28.44082
1965	28.501
1970	27.67226
1975	26.49738
1980	26.51026
1985	27.02914
1990	27.37228
1995	27.7795
2000	28.37522
2005	29.63038
2010	31.21484
2015	32.192
2020	32.39973
2025	31.67831
2030	31.12638
2035	31.10532
2040	31.14401
2045	31.24117
2050	30.63282
2055	29.6515
2060	28.89209
2065	28.44595
2070	28.10352
2075	27.62649
2080	26.93629
2085	26.15236
2090	25.45993
2095	24.9352
2100	24.50363