Year	Percent
1950	30.45359
1955	29.52994
1960	28.68837
1965	27.95099
1970	27.21542
1975	26.75332
1980	26.2266
1985	25.79074
1990	25.94295
1995	26.24714
2000	26.79122
2005	27.36907
2010	27.59061
2015	27.8476
2020	28.16659
2025	28.70839
2030	29.59355
2035	30.36199
2040	30.89642
2045	31.19391
2050	31.27239
2055	31.31135
2060	31.30202
2065	31.17096
2070	30.87937
2075	30.47288
2080	29.99692
2085	29.52238
2090	29.07197
2095	28.61014
2100	28.13445