Año | Dato |
1985
|
20,54
|
1986
|
20,51
|
1987
|
20,51
|
1988
|
20,58
|
1989
|
20,74
|
1990
|
20,84
|
1991
|
21,62
|
1992
|
21,55
|
1993
|
21,75
|
1994
|
22,26
|
1995
|
22,90
|
1996
|
23,07
|
1998
|
23,63
|
1999
|
23,88
|
2000
|
23,86
|
2001
|
24,27
|
2002
|
24,36
|
2003
|
25,03
|
2004
|
26,44
|
2005
|
29,13
|
2006
|
29,69
|
2007
|
31,68
|
2008
|
33,02
|
2009
|
34,34
|
2010
|
34,78
|
2011
|
33,65
|
2012
|
34,48
|
2013
|
35,00
|
2014
|
33,64
|
2015
|
32,44
|
2016
|
32,14
|
2017
|
32,87
|
2018
|
32,96
|
2019
|
34,09
|
2020
|
35,46
|
2021
|
36,91
|
2022
|
37,34
|
2023
|
37,52
|
|
|
|