Mike63,
First off, any worldwide figure seen for an album is a shipment figure and not a sales figure since not all countries have the soundscan system. The initial shipment for POP was 4.5 million copies. The album sold well in the first two months but after that fell off the chart. I saw several figures that said 6 million at the end of 1997, but the one I saw in Billboard was 5.5 million and I would go with that. POP only sold 1.5 million in the USA and is certified in Europe for 2 million copies sold. Canada 380,000. Australia only 70,000. Right there you have 70% of the world market and 4 million sales unless of course POP is close to 3 million in Europe which I doubt. The only single country that I know of POP going multi-platinum is Canada.
So everything I have seen points to 5.5 million. You name the territory or country and if stats are available they will show that ATYCLB has sold more than double that of POP, except Canada of Course. In the UK 1 million to 300,000. The USA almost 4 million to 1.5 million. In Europe nearly 4 million to 2 million. Australia almost 350,000 to 70,000.
In a month or two, ATYCLB will hit the 11 million mark worldwide and at that time, its sales will be double that of POP 5.5 million.