In the US here is a break down of what the sales % age is of various types of lift trucks in normal business climates.
Class 1. Battery powered lifts, counterbalanced - 3 & 4 wheel designs (including stand-up counterbalance) ~24 -26% of units sold.
Class 2. Battery Powered Narrow aisle units & Order Selectors (mostly high lifts type, pantograph reach & VNA units - 12 -14%
Class 3. Low lift & high lift battery powered walk behind & Walk/Ride, Tow Tractors - ~30-32%.
Class 4. Engine Powered Counter Balanced w/ cushion or press-on solids tires (or tyres) - 22-25%
Class 5. Engine powered Counter Balanced w/pneumatic tires (or tyres) - ~18-20%.
These percentages will change widely especially during slow economic times and that is when the electric units will show higher than average % of units sold - as the big users of electric are in the food business & Americans will always eat.

In the US we use lifts for multiple purposes to work inside & outside (on concrete surfaces), the most common rack system uses a is 16" rack beam, our most commonly used unit is a basic 5000lb unit equipped with a a side shift & the most common pallet is a 40" W x 48" long. The minimum work aisle needed is a 10' clear aisle & an LP powered cushion can do the job. Of course, new warehouses look to space saving equipped to pack the "cube", with reduced working aisles & higher rack systems. Many of our business do not work with the "Just-In-Time" manufacturing principles but are slowly moving in that direction. So materials are put into a storage rack system for use as production requires. Another factor the United States still has lots of open usable land compared to other countries. You'll find the pneumatic units widely used in lumber yards, brick & concrete block operation (manufacturer & distribution). I recall a meeting with a first time visitor to the US from Mitsubishi Corporation, Japan & we were discussing our dealer network & growth potential by using a map of the USA & he wanted to know why we didn't have more dealers in the states of Montana & Wyoming, North & South Dakota, Nebraska, etc - it took an hour + for him to understand - not so many people, big farms or cattle ranches, too far away from major business centers, ports, water ways, like major rivers, etc.
Hope this helps your understanding a little better.