1974

6.4

2003

7.8

2013

5.2

1995

7.3

2016

7.8

2013

4.5

2007

4.6

2006

4.1

1980

4.8

1990

3.5

1999

6.7

2019

6.6

1990

2.0

1982

3.0

1994

5.3

1991

7.3

1991

6.7

1981

4.7

1969

7.0

1992

1.0