Complex sentence: The white population of Zimbabwe reached a peak of about 296,000 in 1975, representing just over four percent of the population, but numbers then started to drop, to around 120,000 in 1999, and to no more than 50,000 in 2002, possibly much less.
Split into simpler sentences: The white population of Zimbabwe reached a peak of about 296,000 in 1975, representing just over four percent of the population. Numbers fell to around 120,000 in 1999 and to no more than 50,000 in 2002, possibly much less.