Year	Percent
1950	13.9391
1955	12.54593
1960	15.22743
1965	15.3588
1970	15.66371
1975	15.57042
1980	15.85477
1985	15.92848
1990	15.61565
1995	14.71142
2000	13.85193
2005	13.25225
2010	13.03514
2015	13.37006
2020	13.56068
2025	12.41856
2030	11.41706
2035	10.71586
2040	10.25111
2045	9.78199
2050	9.25299
2055	8.68307
2060	8.11006
2065	7.62589
2070	7.21857
2075	6.88536
2080	6.58158
2085	6.28674
2090	6.03118
2095	5.80932
2100	5.63805