1991

5.7

2019

6.5

2020

6.5

1985

7.2

1993

6.6

2019

7.0

2017

6.1

2010

7.0

1988

6.5

2016

6.7

1989

5.5

1999

5.9

1983

7.9

2003

6.3

1998

7.9

1994

6.2

1993

6.2

1977

8.2

2001

7.9

2019

6.7