Year	Percent
1950	30.28163
1955	27.79667
1960	31.09184
1965	28.79706
1970	26.38603
1975	27.8602
1980	28.24904
1985	31.43011
1990	31.5668
1995	30.74117
2000	30.49943
2005	30.9338
2010	32.43074
2015	31.79474
2020	29.25867
2025	26.64083
2030	24.99125
2035	26.14894
2040	28.24688
2045	29.46851
2050	28.36611
2055	26.08453
2060	25.06002
2065	25.1077
2070	25.58319
2075	25.71015
2080	25.1656
2085	24.19547
2090	23.29649
2095	22.82372
2100	22.75877