1985

6.7

1989

5.5

2013

6.5

1989

9.3

2020

6.5

1989

6.2

1997

5.1

1965

6.4

1989

5.5

1995

5.6

2016

6.0

1937

7.2

2007

4.7

2006

5.8

2015

6.4

1986

7.4

1986

5.6

1920

7.9

2001

5.2

1939

7.3