Year	Percent
1950	32.70538
1955	31.69112
1960	30.51312
1965	29.45958
1970	28.93351
1975	29.04233
1980	28.54355
1985	28.33214
1990	28.04016
1995	28.10198
2000	29.22078
2005	29.81327
2010	30.35969
2015	30.41254
2020	29.36484
2025	28.89675
2030	28.3918
2035	27.93593
2040	27.61075
2045	27.06027
2050	26.45201
2055	25.75676
2060	25.1243
2065	24.57524
2070	24.08891
2075	23.63473
2080	23.1979
2085	22.78801
2090	22.41336
2095	22.09728
2100	21.83054