1998

6.6

2006

6.2

2014

5.1

1974

4.7

1990

4.4

2017

5.7

1975

2.3

2018

6.8

2001

7.4

2001

5.5

2002

6.1

2002

5.7

2002

5.1

1982

6.8

2019

6.3

1973

7.1

2005

6.2

1978

3.4

1990

6.8

1976

6.7