Based on Brazil's current population age structure what do you expect in both the short term and long term to happen to Brazil's population?

Below is the population pyramid of Brazil for year 2010:

 We can see that the children(age group 5-19) and the working population(age group 20-54) is pretty high with the progressive decrease towards the older population.

I think that in the short term, the population will remain more or less the same or stable with not much substantial difference:

But in the long term, after around fifty years, Brazil's population pyramid is expected to change drastically with comparatively low birth rate and an even lower death rate. Which would mean that there would be a high population in the older age groups. This is evident from the expected population pyramid of 2050: