Complex sentence: This class of protected area has been in use as early as 1985 and as of 2016, there are fifteen conservation reserves that cover an area of 194.7 square kilometres (75.1 sq mi) or less than 1% of South Australia's land area.
Split into simpler sentences: This class of protected area has been in use as early as 1985. There are presently fifteen conservation reserves that cover an area of 194.7 square kilometres (75.1 sq mi), or less than 1% of South Australia's land area.