2015

6.3

2006

7.0

2006

3.5

2003

5.8

2005

7.2

2005

6.2

2003

6.4

1999

5.2

2002

5.9

1994

3.6

1986

7.0

1969

5.3

1989

6.6

2013

6.0

2020

6.9

2007

6.7

2001

6.8

1986

6.5

2004

6.7

1965

5.6