1961

7.7

2011

6.5

2017

6.0

1998

6.0

1984

7.3

1995

6.2

2013

5.6

1985

6.4

2021

9.2

1974

7.0

1988

7.5

1994

6.5

2015

5.5

2009

5.7

2018

8.2

2000

5.5

2013

6.1

2013

6.1

2010

6.9

1994

7.3