2017

6.7

1986

7.6

1955

7.9

2005

6.9

1963

7.5

1972

7.1

1956

7.5

1978

6.0

1946

7.6

1968

7.2

1995

7.9

1979

7.2

2001

7.8

1983

5.8

1999

7.0

2006

7.1

2001

7.4

2002

6.3

2015

0.0

1997

6.7