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			So here is my roundabout way of getting an estimate of the number of Boxsters remaining. I know its wrong but its fun to try.
 Basically we know how many Boxsters were sold in the US every year.  Then we look at how many are currently listed for resale on Autotrader for each year of production. If the number for sale for any year is a constant based on the number of cars remaining, then we can calculate how many cars remain for each year based on the original amount sold.
 
 Year	Produced	Listing	Percent	Remaining
 1997		        22
 1998	   9500	33	0.0058	3780
 1999	 14000	62	0.0044	4261
 2000	 14300	68	0.0048	4673
 2001	 12000	87	0.0073	5979
 2002	   9875	65	0.0066	4467
 2003	   6088	75	0.0123	5154
 2004	   3513      61	0.0174	4192
 2005	   7879      53	0.0067	3642
 2006	   4503      75	0.0167	5154
 2007	   3622	53	0.0146	3642
 2008	   2982	77	0.0258	5291
 2009	   1909	20	0.0105	1374
 2010	   2177	23	0.0106	1581
 2011	   1773	35	0.0197	2405
 2012	   2894	26	0.0090	1787
 2013	   4570      149	0.0326	10239
 2014	   3875	297	0.0766	20410
 2015		        369
 
 
 The listing rate based on cars from 2004 to 2012 averages 1.46% of the produced stock assuming no loss of these cars. Now if you look at the the listing rate of the oldest cars it drops to 0.7 to 0.5% of the produced stock. If we assume the drop in the listing rate is due to scrapping of cars, we can calculate the cars remaining by the following equation:
 remaining = produced * listed rate/1.46%(average rate for no loss cars)
 
 The problem with this calculation is that it assumes the average rate of sale of any year is based only on the remaining cars.  There are however other factors that would influence this rate - specifically the price of the car drops the older they are.  This price difference can influence whether one is willing to sell a car, so you could argue that people who own the car won't want to sell/list at a low price as it is not worth the money and hold on to the cars instead.
 
 This analysis suggests that 55-70% of the 1997-2002 Boxsters have been scrapped! I doubt its right, but interesting anyways.
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