1988

7.4

2002

5.3

2009

6.0

2003

5.9

1995

6.2

2014

6.3

1998

6.6

1984

6.8

2001

5.2

1990

6.9

2005

6.2

1984

5.3

2019

7.7

1913

0.0

1933

0.0

1998

9.4

2004

6.4

1993

6.1

2018

8.0

1986

7.3