1987

7.1

1990

5.5

1995

6.2

1939

6.2

2005

4.2

1993

6.0

2000

7.1

1989

6.3

2003

7.9

1998

6.2

2021

7.5

1994

6.4

1987

6.4

2004

5.5

2001

6.8

1998

6.1

2006

5.9

1980

5.5

1995

5.7

1987

6.2