1986

6.7

2015

5.8

2001

6.4

1970

4.1

2018

3.7

2004

1.0

2006

6.6

1968

5.5

1974

7.5

1969

5.1

2003

7.2

1999

7.1

1997

6.6

1990

6.6

2001

6.9

2003

7.1

1975

5.8

1973

5.7

2004

6.3

2025

10.0