1985

8.1

1981

6.8

2018

6.5

1960

7.5

1990

7.5

1995

7.3

1997

6.0

2003

7.0

2018

4.1

2010

3.7

2005

5.0

1996

6.8

1981

5.2

1986

6.5

1953

7.4

2000

5.8

2006

6.5

1997

5.7

2024

8.6

2016

7.4