Year	Percent
1950	13.27894
1955	13.25872
1960	13.33873
1965	13.36693
1970	13.19043
1975	13.40168
1980	13.91891
1985	13.94491
1990	14.84974
1995	16.49279
2000	18.13302
2005	19.24488
2010	20.24857
2015	20.84602
2020	21.58712
2025	23.32843
2030	25.5805
2035	27.71725
2040	29.06795
2045	28.62629
2050	27.07411
2055	25.54543
2060	24.84048
2065	24.93035
2070	25.23197
2075	25.15105
2080	24.55335
2085	23.77697
2090	23.24737
2095	23.11597
2100	23.20221