1982

4.6

2009

7.6

2022

7.3

2003

7.8

1972

7.1

2001

7.4

2006

8.0

1998

6.4

1997

7.5

1993

6.4

1989

6.3

1964

7.1

1951

7.6

2002

5.1

1999

6.5

2000

6.4

1999

6.6

2008

5.6

1989

6.8

1995

6.2