Year	Percent
1950	21.70705
1955	21.8721
1960	21.44681
1965	21.16157
1970	20.71463
1975	19.43681
1980	19.2348
1985	19.40886
1990	21.02571
1995	22.7124
2000	25.02355
2005	26.85185
2010	27.20779
2015	27.32428
2020	25.91853
2025	24.53639
2030	23.91402
2035	23.77283
2040	24.20122
2045	24.14309
2050	24.08925
2055	23.75345
2060	23.70602
2065	23.89099
2070	23.67883
2075	23.40984
2080	23.08979
2085	22.79439
2090	22.56178
2095	22.3973
2100	22.23293