Even if we take the total number of iTunes customers (~800 millions), it comes down to 30,800.
Source: http://verizonmath.blogspot.com
http://www.digitalmusicnews.com/permalink/2014/04/24/itunes8....
800 Million,
#4 ipod users
http://www.statista.com/statistics/276307/global-apple-ipod-....
2010 @ 50.31 Million
2011 @ 42.62 Million
2012 @ 35.17 Million
2013 @ 26.38 Million
Total = 154,480,000
#5 Apple Laser Printer user
#6 Apple magic mouse user
#7 Apple Newton user
#8 Apple PowerBook user
#9 Apple MacBook user
#9 Apple Xserve user
Yes I made a mistake, however this is just a word game from Apple overall.
Legally there is a combination of abuse and grey area right now, and it's going to get worse near term.
Those government information requests don't cover how many times an officer at the local or state level has accessed someone's phone either illegally or questionably legally.
This move by Apple can help to blunt that effort by the local police.
I would think at least 50% of the older models are either on-sold or the user hasn't upgraded.
edit: UVB-76 has a good point, there is probably a very high percentage overlap.
#1 Mac unit sales
http://www.macworld.com/article/2062821/apple-by-the-numbers...
2010 @ 13662k
2011 @ 16735k
2012 @ 18158k
2013 @ 16341k
Total = 64,896,000
#2 iPhone unit sales
http://www.statista.com/statistics/232790/forecast-of-apple-...
I only take the number from 2013 & 2014 because Apple trend to upgrade fast.
2013 @ 53.6 Million,
2014 @ 63.2 Million,
Total = 116,800,000
Now, quote from "Government Information Requests"
"less than 0.00385% of customers had data disclosed due to government information requests."
Only 699529.6 round to 699529 customers had data disclosed.