1993

6.5

2000

7.2

2006

4.8

2002

7.1

1987

6.6

2008

5.7

1993

3.7

1964

6.2

1965

6.1

1999

6.1

2002

6.6

1962

7.6

1995

6.2

2006

6.2

2001

6.8

2010

4.6

1999

6.8

2024

6.7

1952

6.2

1964

6.3