2008

7.5

2013

6.9

2008

6.7

2006

6.4

2006

6.5

1990

6.9

2020

0.0

1989

5.9

2003

6.1

1988

2.5

1995

7.0

2004

6.9

1991

7.3

1931

8.3

1964

8.1

1997

8.4

2013

6.3

2020

0.0

2025

8.0

1970

7.0