1997

7.1

1992

7.0

2007

7.2

1969

6.8

2005

6.8

2015

6.6

1993

5.7

1989

6.3

2016

4.5

1964

7.3

2003

7.4

1962

7.3

1999

6.2

1988

5.1

2016

6.6

2003

2.0

2004

6.4

1994

6.2

2008

6.0

2005

5.5