Year	Percent
1950	24.79101
1955	25.57333
1960	25.81745
1965	25.86435
1970	24.5675
1975	22.56759
1980	20.94941
1985	20.57319
1990	22.35414
1995	24.23774
2000	26.07158
2005	27.04794
2010	27.05018
2015	27.08412
2020	26.38248
2025	25.80174
2030	25.11661
2035	24.79558
2040	25.05221
2045	24.9461
2050	24.69181
2055	24.19367
2060	23.93134
2065	23.92553
2070	23.81192
2075	23.80673
2080	23.60683
2085	23.32455
2090	23.06656
2095	22.88226
2100	22.75397