Complex sentence: Kenya's population was reported as 38.6 million in 2009, compared to in 28.7 million in 1999,21.4 million in 1989, and 15.3 million in 1979, an increase of 2.5 over 30 years, or an average growth of more than 3 percent per year.
Split into simpler sentences: Kenya's population was reported as 38.6 million in 2009 compared to in 28.7 million in 1999,21.4 million in 1989, and 15.3 million in 1979. This was an increase of 2.5 over 30 years, or an average growth of more than 3 percent per year.