1969

6.6

1988

6.3

1986

6.1

2002

6.8

2007

6.5

2008

8.5

2016

7.2

2001

7.3

1982

5.7

2020

6.5

1999

3.5

2016

6.5

2005

5.3

2003

5.9

1966

6.1

2007

10.0

2007

10.0

1964

7.1

1970

7.1

1996

6.5