Youth in Guatemala are the largest segment of the nation's population. Youth includes individuals between the ages of 15 and 24 Over half of the population is under 19 years old in 2011, the highest proportion of young people of any country in Latin America. The health, education, and work opportunities for young people differ by ethnicity ("ladino" or indigenous) and social class.
Youth in Guatemala are the largest segment of the nation's population to this day.
The context doesn't give enough information to say that the youth are currently the largest population segment since the only date referenced is in 2011. For all the reader knows there was a plague yesterday that wiped out all of the youth in Guatemala. My statement is neither definitely correct nor definitely incorrect based on the data given.