Year	Percent
1950	15.17009
1955	15.37426
1960	15.54382
1965	14.88359
1970	14.17028
1975	14.21329
1980	14.65264
1985	15.88038
1990	16.41927
1995	17.42157
2000	19.41397
2005	21.78203
2010	25.16406
2015	25.84637
2020	26.32195
2025	26.11571
2030	25.55209
2035	25.86285
2040	26.15107
2045	26.44542
2050	26.13297
2055	25.89335
2060	25.56486
2065	25.28543
2070	25.09801
2075	24.56013
2080	24.10532
2085	23.81476
2090	23.56625
2095	23.34036
2100	23.10849