Year	Percent
1950	27.63864
1955	26.80916
1960	26.19188
1965	25.18169
1970	24.01175
1975	24.54484
1980	25.50778
1985	27.14404
1990	28.89884
1995	30.54639
2000	32.98806
2005	35.59096
2010	36.37864
2015	35.23504
2020	32.01565
2025	28.27629
2030	26.76547
2035	27.51488
2040	28.8629
2045	29.63191
2050	28.31728
2055	25.7444
2060	24.11286
2065	23.58151
2070	23.79997
2075	24.02792
2080	23.73832
2085	22.93922
2090	22.00968
2095	21.41035
2100	21.27291