2005

6.3

1994

8.3

1991

7.5

2006

5.4

2019

3.5

2006

3.5

1959

7.1

2007

5.1

1989

6.7

2005

6.8

1989

7.2

1992

6.9

1970

5.3

2001

3.8

1999

7.0

2007

7.3

1997

7.4

1990

6.3

1964

6.5

2007

5.4