Año | Dato |
1985
|
12,28
|
1986
|
12,12
|
1987
|
12,12
|
1988
|
12,46
|
1989
|
12,40
|
1990
|
11,89
|
1991
|
12,01
|
1992
|
11,99
|
1993
|
12,61
|
1994
|
12,59
|
1995
|
12,53
|
1996
|
12,12
|
1998
|
12,24
|
1999
|
12,50
|
2000
|
12,75
|
2001
|
13,26
|
2002
|
13,80
|
2003
|
15,09
|
2004
|
16,51
|
2005
|
17,89
|
2006
|
19,08
|
2007
|
19,10
|
2008
|
20,82
|
2009
|
21,31
|
2010
|
21,02
|
2011
|
22,48
|
2012
|
23,31
|
2013
|
23,63
|
2014
|
23,24
|
2015
|
23,37
|
2016
|
23,51
|
2017
|
24,03
|
2018
|
24,60
|
2019
|
25,24
|
2020
|
26,03
|
2021
|
27,43
|
2022
|
28,33
|
2023
|
28,62
|
|
|
|