2004

6.2

1999

7.9

2007

8.5

2007

8.1

2007

8.7

1987

7.7

2006

7.1

1959

5.8

2001

7.6

2005

4.5

2002

8.5

1997

8.1

2005

7.1

2007

6.8

2014

8.3

2017

0.0

2004

7.6

2021

7.2

1989

8.4

2017

0.0