More Numbers from the Horse

Wikipedia has a chart of the "modern" "standard" post-Victorian era convention for this code and would give the following:

40 -> 2
41 -> 3
42 -> 4
43 -> 5
44 -> 4
45 -> 3
46 -> 4
47 -> 5
48 -> 6
49 -> 4
50 -> 1

At the bottom of the Wikipedia page for this code is an External Link to an Online Converter, and it agrees with my above answers for 40-50.

Where in the World is the Hoofing Horse?

The horse is very old, perhaps many centuries old, and is from Europe.
Here are some more inputs and hoof taps:

16 -> 3
17 -> 4
18 -> 5
19 -> 3

28 -> 6

1 -> 1
10 -> 1
100 -> 1
1000 -> 1

5 -> 1
50 -> 1
500 -> 1

2 -> 2
20 -> 2
200 -> 2
2000 -> 2

3 -> 3
30 -> 3
300 -> 3
3000 -> 3

I hope I have given enough clues that you can figure out the code now (or
at least know how many times the horse will tap its hoof if you say "33").