Year	Percent
1950	12.44229
1955	12.74975
1960	12.69948
1965	12.43549
1970	12.10661
1975	11.77014
1980	11.54668
1985	11.38344
1990	10.97457
1995	10.17278
2000	9.40089
2005	8.93033
2010	9.16323
2015	10.2477
2020	11.454
2025	12.43537
2030	13.23679
2035	13.89753
2040	14.66595
2045	15.56852
2050	16.3857
2055	17.12317
2060	17.79331
2065	18.41961
2070	19.08146
2075	19.71537
2080	20.257
2085	20.72835
2090	21.1629
2095	21.59073
2100	21.98935