1993

3.8

1964

5.3

1987

6.2

2005

8.0

1985

6.0

2004

4.2

2003

7.8

2021

9.3

2020

5.9

2003

7.4

1989

8.0

1966

6.4

2006

7.4

1991

4.2

1992

6.7

2018

6.0

2010

10.0

1986

6.2

1958

6.7

1990

7.8