Year	Percent
1950	16.54833
1955	16.38112
1960	13.77097
1965	12.5408
1970	14.36512
1975	15.95513
1980	18.36633
1985	17.44845
1990	15.6697
1995	15.32348
2000	17.0264
2005	21.85823
2010	25.0175
2015	25.69132
2020	25.29557
2025	25.59946
2030	27.58508
2035	29.32429
2040	29.24577
2045	27.33388
2050	25.27141
2055	25.3064
2060	26.31682
2065	27.20243
2070	27.11077
2075	25.63218
2080	24.83503
2085	24.8316
2090	25.06062
2095	24.95571
2100	24.50782