Year	Percent
1950	18.25084
1955	19.25797
1960	19.00767
1965	18.3398
1970	14.26699
1975	11.82574
1980	11.53679
1985	10.5452
1990	9.44633
1995	10.02988
2000	8.51091
2005	7.99693
2010	6.6551
2015	5.63262
2020	5.36625
2025	5.35798
2030	5.38994
2035	5.2542
2040	4.98998
2045	4.73075
2050	4.61606
2055	4.66709
2060	4.76523
2065	4.79313
2070	4.73423
2075	4.64345
2080	4.6057
2085	4.65154
2090	4.73836
2095	4.79746
2100	4.80182