I need the annual or general dollar size of each aftermarket
(accessories)cateogory:

marine accessories
motorcycle accessories
atv accessories
rv accessories

<Accessories market.

Marine accessories
The boating accessories market is worth $2.4 billion
Source: National Marine Manufacturers Association (NMMA).
http://66.249.93.104/search?q=cache:quT3m66cFCEJ:www.uscgboating.org/waypoints/aug05/article11_home.htm+%22marine+accessories%22+billion&hl=nl&ct=clnk&cd=1

Motorcycle accessories.
There is a $2.4 billion market for motorcycle accessories.
Source: Revving up MotorcycleUSA.com
http://www.businessweek.com/ebiz/0005/wm0525.htm

RV accessories.
RV ers spend $3 billion per year on RV aftermarket products.
Source: AGI
http://www.rv.net/orn/rv_industry.html

ATV accessories - $1.6 billion.
16% of $10 billion is $1.6 billion.

Accessories account for 16% of the market.
Source: Dealer News.
http://paatving.com/Articles/stateatvsales/pasalesstats.asp

The ATV market generates $10 billion in retail revenue.
Source: Suzuko Sponsors ATV World?s Fair. ATV Rider.
http://www.atvrideronline.com/newsfront/03112004_atv_suzuki_fair/>


<Search strategy:>

<"rv aftermarket" billion>
<://www.google.com/search?hl=nl&rls=GGLG%2CGGLG%3A2006-26%2CGGLG%3Aen&q=%22rv+aftermarket%22+billion&lr=>

<"motorcycle accessories" billion>
<://www.google.com/search?hl=nl&rls=GGLG%2CGGLG%3A2006-26%2CGGLG%3Aen&q=%22motorcycle+accessories%22+billion&lr=>

<"marine accessories" billion>
<://www.google.com/search?hl=nl&rls=GGLG%2CGGLG%3A2006-26%2CGGLG%3Aen&q=%22marine+accessories%22+billion&lr=>

<Hope this helps.>