Año | Dato |
1985
|
19,56
|
1986
|
19,81
|
1987
|
19,79
|
1988
|
20,03
|
1989
|
20,75
|
1990
|
21,10
|
1991
|
21,33
|
1992
|
21,80
|
1993
|
22,50
|
1994
|
22,91
|
1995
|
23,28
|
1996
|
23,47
|
1998
|
23,93
|
1999
|
24,26
|
2000
|
25,17
|
2001
|
26,67
|
2002
|
27,91
|
2003
|
28,78
|
2004
|
29,44
|
2005
|
31,59
|
2006
|
33,79
|
2007
|
34,62
|
2008
|
35,67
|
2009
|
35,99
|
2010
|
37,81
|
2011
|
39,29
|
2012
|
40,32
|
2013
|
42,21
|
2014
|
41,78
|
2015
|
42,12
|
2016
|
42,17
|
2017
|
42,69
|
2018
|
44,23
|
2019
|
44,54
|
2020
|
44,88
|
2021
|
48,15
|
2022
|
48,17
|
2023
|
48,97
|
|
|
|