2001

5.8

1998

6.5

1995

3.9

2016

6.6

1984

4.9

2007

5.6

2019

8.2

1996

7.0

2004

5.0

1986

6.3

2006

6.8

2002

6.0

2006

6.3

2018

7.5

2000

6.6

1977

5.6

2004

6.2

2016

6.9

1934

4.7

2015

5.5