Year	Percent
1950	29.2811
1955	28.95187
1960	28.29742
1965	28.13781
1970	27.99937
1975	28.45396
1980	28.3115
1985	27.46961
1990	27.5042
1995	28.16519
2000	31.7108
2005	35.73148
2010	38.45519
2015	40.08257
2020	41.97783
2025	42.27193
2030	41.02408
2035	38.1868
2040	35.75295
2045	34.38546
2050	33.18647
2055	32.35824
2060	31.64005
2065	31.06329
2070	30.59003
2075	30.17303
2080	29.76779
2085	29.2885
2090	28.74437
2095	28.13092
2100	27.48636