Year	Percent
1960-01-01	0.6896000000000000
1961-01-01	0.8840580000000000
1962-01-01	1.0330700000000002
1963-01-01	1.1180500000000000
1964-01-01	0.7980050000000000
1965-01-01	0.6884070000000000
1966-01-01	0.8004340000000000
1967-01-01	0.8257350000000000
1968-01-01	0.5878869999999999
1969-01-01	0.6192040000000000
1970-01-01	0.6964040000000000
1971-01-01	0.8552000000000000
1972-01-01	1.0732899999999999
1973-01-01	1.0766000000000000
1974-01-01	0.7144620000000000
1975-01-01	0.8170960000000000
1976-01-01	0.6358320000000000
1977-01-01	0.6152710000000000
1978-01-01	0.7695680000000000
1979-01-01	0.5432000000000000
1980-01-01	0.5432000000000000
1981-01-01	0.5432000000000000
1982-01-01	0.5432000000000000
1983-01-01	0.5432000000000000
1984-01-01	0.5432000000000000
1985-01-01	0.5432000000000000
1986-01-01	0.5432000000000000
1987-01-01	0.5432000000000000
1988-01-01	0.5432000000000000
1989-01-01	0.5432000000000000
1990-01-01	0.5432000000000000
1991-01-01	0.5432000000000000
1992-01-01	0.5432000000000000
1993-01-01	0.5432000000000000
1994-01-01	0.5432000000000000
1995-01-01	0.5432000000000000
1996-01-01	0.5432000000000000
1997-01-01	0.5432000000000000
1998-01-01	0.5432000000000000
1999-01-01	0.5432000000000000
2000-01-01	4.0784699999999990
2001-01-01	3.9753300000000005
2002-01-01	4.0901400000000000
2003-01-01	4.6123600000000000
2004-01-01	4.3406600000000000