Complex sentence: October 2006, found a 51.2% growth compared to the same period of 2005; in December 2007, the number of these units (40 million) exceeded Argentina's total population.
Split into simpler sentences: October 2006, found a 51.2% growth compared to the same period of 2005. In December 2007, the number of these units (40 million) exceeded Argentina's total population.