1997

5.0

1969

7.2

1973

7.4

2018

7.0

1968

7.3

2021

0.0

1982

2.0

1991

5.8

1983

5.6

1990

6.4

2000

5.7

2005

1.5

2015

5.3

1995

5.6

1974

5.8

2010

8.1

1998

6.4

2005

6.2

2008

6.0

1999

6.8