Just checking.
Mexico: 80% Catholic (just 43% of which identify as practicing)
10% Protestant
~10% Agnostic/Atheist
http://www3.inegi.org.mx/sistemas/TabuladosBasicos/Default.aspx?c=27302&s=est
Belize: 40% Catholic
32% Protestant
10% Other
15.5% Atheist
http://www.belize.com/belize-demographics -- The official state census site is down ATM.
Costa Rica: 70.5% Catholic
14% Protestant
11% Atheist
2% Buddhist (?) http://www.state.gov/j/drl/rls/irf/2008/108520.htm
El Salvador: 47% Catholic
33% Protestant
17$ Atheist
3% other
http://www.state.gov/j/drl/rls/irf/religiousfreedom/index.htm#wrapper
Guatemala: 50-60% Catholic
30-40% Protestant
5% Syriac
3% Orthodox
http://www.state.gov/j/drl/rls/irf/2006/71462.htm
Honduras: 47% Catholic 17% Other
Annuario Pontificio, 2009.
Nicaragua: No recent information.
Panama: 75-85% Catholic
15-25% Protestant
http://www.state.gov/j/drl/rls/irf/2007/90262.htm