1963

9.5

5.0

1987

5.3

2021

6.2

1975

4.5

1997

6.0

2010

5.6

2008

6.8

2004

5.0

2007

5.4

1994

4.6

1997

6.2

1988

5.5

2003

6.2

2001

8.9

2019

6.9

2010

7.0

1999

7.2

1973

6.3

1985

8.1