Year	Percent
1950	13.23914
1955	13.44489
1960	13.66362
1965	13.54544
1970	13.42918
1975	13.25866
1980	13.48905
1985	13.21431
1990	13.08911
1995	12.59096
2000	12.11538
2005	11.6743
2010	11.82819
2015	12.35015
2020	13.02632
2025	14.26887
2030	15.56375
2035	17.3502
2040	19.56179
2045	21.41829
2050	22.8477
2055	23.84021
2060	24.41834
2065	24.8992
2070	25.39927
2075	25.68727
2080	25.77634
2085	25.73519
2090	25.62964
2095	25.46287
2100	25.24563