Year	Percent
1950	16.26385
1955	17.02355
1960	16.35934
1965	16.6863
1970	20.49323
1975	22.13169
1980	25.8096
1985	24.2732
1990	23.09753
1995	24.73269
2000	26.27609
2005	29.33031
2010	29.11277
2015	28.03598
2020	27.20037
2025	27.82837
2030	30.85736
2035	30.66564
2040	28.22356
2045	25.35747
2050	22.90423
2055	23.91581
2060	26.22903
2065	27.48465
2070	27.24501
2075	25.58685
2080	24.50584
2085	24.3846
2090	25.03795
2095	25.6917
2100	25.68759