1999

6.8

2001

7.5

1993

6.7

2005

6.9

1985

7.7

1997

7.9

2010

1.0

1931

8.3

1989

7.8

1925

8.0

2002

7.2

1994

7.0

2006

7.1

2006

7.3

2003

7.2

2007

0.0

2006

7.3

1990

6.5

2017

8.0

2017

0.0