Year	Percent
1950	10.68271
1955	9.98737
1960	11.72067
1965	13.58614
1970	14.30016
1975	12.96846
1980	14.11363
1985	13.22639
1990	11.89248
1995	11.32634
2000	10.44474
2005	12.46427
2010	11.48016
2015	10.27279
2020	9.06195
2025	8.94815
2030	8.80487
2035	8.4506
2040	8.02702
2045	7.60592
2050	7.23771
2055	6.95941
2060	6.71607
2065	6.47933
2070	6.23506
2075	6.02462
2080	5.85085
2085	5.71522
2090	5.60825
2095	5.508
2100	5.40524