1986

6.1

2002

6.8

2003

5.9

1988

6.3

1982

5.7

2004

5.6

1970

7.1

1964

7.1

2001

7.3

1996

5.3

2003

5.4

2014

6.7

1995

4.5

2020

0.0

1903

5.5

0.0

2005

4.0

1994

7.5

2007

10.0

2007

10.0