1964

7.0

2005

6.7

1984

5.9

1965

6.8

1967

6.7

2016

6.4

2017

6.4

1990

6.1

2015

4.4

1994

6.0

1997

4.3

1986

6.3

1989

5.8

2003

6.6

2013

4.8

2017

6.9

2016

6.5

1997

6.5

2021

5.0

2022

7.0