2020

7.0

2015

6.0

1991

5.3

1987

6.0

1984

6.6

2003

6.0

2008

6.3

2011

6.4

2013

5.5

2021

4.7

1977

6.8

1983

6.1

1990

5.9

1988

6.4

1951

8.3

1975

6.4

2010

4.8

2003

5.7

1990

6.0

1962

7.5