1972

7.2

1999

8.0

2004

7.7

2005

4.9

2006

5.2

1959

5.8

1999

8.3

1991

6.6

2001

7.6

1991

7.8

2005

8.0

1992

6.7

1994

6.2

1990

7.2

1992

7.5

2002

6.7

1997

5.0

2007

7.0

2021

8.8

2016

0.0