2005

5.7

1996

4.8

2005

6.1

1985

7.2

2006

6.2

1987

7.3

2008

4.8

1989

6.8

1993

7.0

1994

5.1

1991

7.1

1968

3.0

2018

6.3

1999

2.0

2005

6.8

1943

6.3

1952

7.4

1964

7.3

1994

6.0

1992

5.3