1962

7.3

2007

6.3

1974

4.7

1990

4.4

1986

6.6

1974

6.7

1975

2.3

1997

6.0

2006

6.8

2005

6.4

2019

6.3

1988

7.1

2003

6.0

1974

6.4

1973

6.9

2007

6.1

1974

6.9

1984

5.7

1992

5.6

2003

4.8