The countries graph shows how the UK is the dominant country, providing almost 40% of the participants at CIIV up to the end of 2015. Next comes the USA and Germany each having about 16% of the share. Then numbers drop and 11 of the 24 countries have been the origin of just one person each.
The other graph shows how total numbers of participants at CIIV fluctuated but has shown a steady rise since a low point in 2011. It is probably significant that the largest numbers have come to Colima the years following increases in the volcano activity, such as 2006 and 2015. Of the 257 participants almost 55% have been female dominating many of the early years. Recently, since 2010, however, it is the guys who have been taking part more.