1998

0.0

1988

6.3

1986

6.1

2020

6.5

2003

5.9

2005

5.3

1997

6.1

2009

6.6

2001

7.3

1999

3.5

2007

6.5

2008

8.5

1982

5.7

1996

6.5

1970

7.1

1966

6.1

1937

3.0

2016

7.2

1964

7.1

2002

6.8