1987

7.5

2000

6.3

2012

6.9

2004

6.2

2011

5.2

2005

7.2

2016

9.7

1970

6.0

1970

6.3

1976

7.5

1979

7.3

1955

5.6

2023

7.0

2001

6.7

2010

6.0

1970

6.7

1998

5.6

2017

6.2

1989

5.1

2001

8.0