Año | Dato |
1985
|
8,66
|
1986
|
8,10
|
1987
|
8,10
|
1988
|
8,10
|
1989
|
8,10
|
1990
|
8,58
|
1991
|
9,74
|
1992
|
10,49
|
1993
|
11,64
|
1994
|
13,48
|
1995
|
15,24
|
1996
|
16,13
|
1998
|
16,86
|
1999
|
17,04
|
2000
|
17,23
|
2001
|
18,04
|
2002
|
18,99
|
2003
|
20,34
|
2004
|
21,88
|
2005
|
23,06
|
2006
|
24,25
|
2007
|
25,06
|
2008
|
26,64
|
2009
|
27,19
|
2010
|
29,32
|
2011
|
30,78
|
2012
|
31,74
|
2013
|
32,06
|
2014
|
32,06
|
2015
|
32,67
|
2016
|
33,10
|
2017
|
33,10
|
2018
|
34,17
|
2019
|
34,98
|
2020
|
36,20
|
2021
|
38,11
|
2022
|
39,32
|
2023
|
39,63
|
|
|
|