Year |
Pedregal |
Xalostoc |
Mean |
SD |
Mean |
SD |
1997 |
21.6 |
16.6 |
71.3 |
34.1 |
1998 |
29.3 |
16.8 |
64.9 |
25.4 |
1999 |
24.4 |
9.2 |
71 |
26.6 |
2000 |
24.7 |
11.3 |
54.8 |
25.3 |
2001 |
23.6 |
10.1 |
41.1 |
17.2 |
2002 |
23.1 |
9.7 |
38 |
13.7 |
2003 |
23.4 |
11.3 |
41.8 |
14.4 |
2004 |
18.4 |
9.4 |
35.5 |
14.7 |
2005 |
20.9 |
11.5 |
30.4 |
17.1 |
2006 |
17.8 |
8.4 |
29.8 |
15.6 |
2007 |
16.2 |
8.5 |
25.3 |
11.3 |
2008 |
18 |
8.3 |
26.3 |
10 |
2009 |
18.4 |
8.7 |
26.4 |
10.7 |
2010 |
14.4 |
7.4 |
24.9 |
13.2 |
2011 |
16.7 |
8.3 |
24.7 |
11.5 |
2012 |
17 |
7.5 |
25.9 |
11.7 |
|