Year	Percent
1950	13.81216
1955	16.85815
1960	14.59203
1965	15.80877
1970	16.3825
1975	13.61026
1980	10.07747
1985	9.84614
1990	11.24997
1995	8.0953
2000	6.13417
2005	5.72655
2010	5.77479
2015	5.87586
2020	5.45112
2025	4.91291
2030	4.57023
2035	4.42876
2040	4.44135
2045	4.50548
2050	4.50938
2055	4.44331
2060	4.38037
2065	4.3712
2070	4.4377
2075	4.53401
2080	4.59379
2085	4.59478
2090	4.5581
2095	4.52309
2100	4.51994