1954

8.3

1990

7.8

2002

7.3

1962

8.0

1987

8.1

1999

6.5

2009

6.5

2002

6.2

1997

6.8

2006

7.3

1967

7.4

1999

7.4

2004

6.6

2005

6.5

1967

6.9

1988

7.7

2019

5.6

1981

5.0

2020

5.9

1973

7.1