I was wondering if anyone had any idea where I could get an idea of how long the typical/average forklift manufacturer exists? Basically, I need to get an idea of how long a manufacturer can expect to survive before being bought out/acquired/merged or going bankrupt.

This data has been very hard to come by, but I did notice that there was an industry wide trend in the late 80's and early 90's of acquisitions and mergers.

Thanks to anyone who can help.