1965

6.3

1982

2.7

1979

5.6

2002

3.3

2017

6.5

1990

6.9

2001

7.8

1998

7.8

2001

7.1

2001

5.9

1966

6.5

1997

6.1

1971

5.2

1933

4.5

2001

5.7

2018

4.5

2003

4.1

1997

6.1

2003

7.4

1997

6.6