You could also extrapolate the relative popularity of the Series 4 from the table of registered owners by year:
http://www.luvtruck.com/regcountyear.phpHell with it, I just combined the two bits of info:
Yr..........Registered users on LUVTruck...............Total Sold
1972.............117.........................................21,098
1973.............55..........................................39,422
1974.............116.........................................30,328
1975.............141.........................................UNK
1976.............239.........................................46,670
1977.............146.........................................67,539
1978.............252.........................................71,145
1979.............474.........................................100,192
1980.............535.........................................88,447
1981.............167.........................................61,724
1982.............63..........................................22,304
1983.............3...........................................UNK
1984.............1...........................................UNK
1985.............1...........................................UNK
1987.............4...........................................UNK
1988.............1...........................................UNK
1989.............2...........................................UNK
p.s. how does one paste tables to threads? The comment UI forces everything to paste plaintext, and won't process multiple 'spaces' in a row, hence the dots.