1987

7.3

1990

5.8

1996

5.2

2020

7.7

1989

6.6

1985

6.3

1990

7.4

1999

7.9

1995

5.0

1990

6.1

1993

4.4

1989

4.4

2013

7.6

1991

6.1

1988

6.6