1991

6.4

1977

6.8

1999

7.9

1986

7.9

1989

7.9

1990

7.4

1998

7.8

2005

7.0

1998

7.1

2004

7.5

1993

6.7

2015

7.9

2013

7.3

2004

6.8

1996

5.3

2022

7.7

1977

7.3

2022

6.7

2006

5.8

1991

7.3