Año | Dato |
1985
|
18,59
|
1986
|
19,07
|
1987
|
19,31
|
1988
|
19,86
|
1989
|
20,15
|
1990
|
20,39
|
1991
|
22,01
|
1992
|
22,53
|
1993
|
23,26
|
1994
|
23,90
|
1995
|
24,83
|
1996
|
23,86
|
1998
|
25,25
|
1999
|
26,95
|
2000
|
27,97
|
2001
|
29,02
|
2002
|
31,20
|
2003
|
34,81
|
2004
|
36,47
|
2005
|
39,21
|
2006
|
41,00
|
2007
|
43,36
|
2008
|
46,80
|
2009
|
47,43
|
2010
|
48,04
|
2011
|
48,96
|
2012
|
49,51
|
2013
|
49,80
|
2014
|
48,91
|
2015
|
49,04
|
2016
|
49,99
|
2017
|
50,61
|
2018
|
52,20
|
2019
|
54,90
|
2020
|
57,52
|
2021
|
59,55
|
2022
|
62,51
|
2023
|
65,93
|
|
|
|