1992

1.0

2001

2.0

1985

5.4

1993

3.2

1990

4.5

1970

1.0

2006

7.0

1987

3.5

2017

5.2

1993

5.0

1999

4.0

2002

4.9

2002

3.7

2015

1.0

2017

2.0

2010

1.0

1968

5.5

1967

2.0

2019

4.2

2003

2.9