1985

7.0

2005

6.7

1999

5.3

1997

6.8

2004

2.0

1992

7.4

2004

7.3

1929

7.4

1987

7.1

2005

4.6

1986

7.6

2006

5.7

1991

7.6

1984

6.2

2004

7.1

2002

7.2

2020

5.8

1985

6.2

2017

6.1

0.0