1970

6.1

2007

7.6

2019

7.0

2004

7.4

2022

6.8

1991

7.7

1996

7.0

1996

7.5

2002

8.1

2005

8.2

1995

5.7

1990

7.4

2005

7.0

1992

6.6

2010

7.9

2000

7.6

2005

7.9

1994

7.6

1999

6.0

2024

5.6