2002

6.9

2011

5.9

2005

5.7

2017

7.4

1972

8.7

1986

7.1

2013

6.1

2002

7.4

1968

6.4

2013

7.1

1953

7.4

2011

7.3

2007

5.5

2006

5.1

1965

6.7

2010

7.0

2019

6.2

1999

6.4

2007

6.0

1989

5.9