Year	Percent
1950	15.27939
1955	15.17664
1960	14.96842
1965	14.64332
1970	14.24408
1975	13.76919
1980	13.12398
1985	12.95347
1990	12.9882
1995	13.21444
2000	13.03126
2005	12.67303
2010	12.10342
2015	11.61788
2020	11.31639
2025	11.26536
2030	11.56725
2035	12.16991
2040	13.16977
2045	14.12986
2050	15.10494
2055	16.03236
2060	16.96238
2065	17.97235
2070	18.93394
2075	19.84904
2080	20.642
2085	21.38234
2090	22.09833
2095	22.78357
2100	23.42047