Complex sentence: As of 2015 about 815,000 people had a gun licence in Australia and there were around 3.5 to 5.5 million Registered Firearms in Australia, with an estimated 1 to 6 million illegal firearms.
Split into simpler sentences: As of 2015 about 815,000 people had a gun licence in Australia and there were around 3.5 to 5.5 million Registered Firearms in Australia. With an estimated 1 to 6 million illegal firearms.