1996

6.6

1989

8.1

2008

8.9

2001

7.6

2010

8.5

2024

7.5

1993

7.9

2016

8.6

1987

8.4

2015

7.8

1979

6.8

2006

7.7

2001

8.5

1990

6.9

2004

8.0

2000

6.9

2015

7.6

1995

6.4

1967

7.8

2015

7.5