1992

7.0

1992

6.6

2017

5.7

2005

4.8

1995

6.6

2006

5.5

2008

6.0

1994

6.1

1989

6.3

1984

5.7

1978

4.5

1962

7.3

1964

7.3

2002

5.8

2006

6.7

1992

5.4

1991

6.5

1997

7.1

2003

6.6

1999

6.2