1955

6.5

2019

7.7

1957

8.5

1996

7.9

1985

8.3

1979

8.2

2006

8.2

1994

8.5

2019

8.1

1988

7.5

2001

7.5

2014

6.2

2007

6.4

2004

7.2

2002

6.6

1997

7.6

1984

8.0

2004

6.0

1998

8.1

2015

7.9