1995

7.2

1986

8.0

2002

7.5

2004

7.8

2006

7.1

2002

8.1

2015

6.5

2021

1.0

1999

7.7

1989

8.0

1999

7.4

2010

5.0

2014

7.1

2007

9.0

1991

0.0

2005

7.2

1977

6.6

1994

7.0

1969

8.2

1976

7.5