Complex sentence: There was a 96% population decline in black rhinos, including the western black rhino, between 1970 and 1992, and by 1995 the number of western black rhinos had dropped to 2,500 individuals.
Split into simpler sentences: There was a 96% population decline in black rhinos, including the western black rhino, between 1970 and 1992. By 1995 the number of western black rhinos had dropped to 2,500 individuals.