1999

7.2

2010

5.8

1992

6.7

1995

7.2

2009

5.9

2016

7.0

1890

4.9

2013

6.8

1986

5.8

7.8

2013

7.3

2019

5.4

2015

8.4

1984

6.7

2012

5.4

2007

8.1

1991

5.0

1993

6.0

2007

7.3