Year	Percent
1950	24.08031
1955	20.85331
1960	16.48553
1965	13.69325
1970	11.87481
1975	10.55559
1980	10.49749
1985	10.56113
1990	10.76342
1995	11.25904
2000	11.633
2005	12.0939
2010	12.95767
2015	14.41213
2020	15.95877
2025	16.83381
2030	17.20025
2035	17.06297
2040	17.78293
2045	19.23287
2050	21.30604
2055	22.94718
2060	23.53678
2065	23.66438
2070	23.42496
2075	23.56875
2080	23.90795
2085	24.16007
2090	24.16325
2095	23.93289
2100	23.60351