Which category?

    1st 01JAN12
    2nd 01JAN11
    3rd 01JAN09
    OW  01JAN09
    4th 01SEP18

OW = other workers.

So check the diff between those dates and your date.

It's impossible to say because as I'm sure you know, the numbers don't always progress, sometimes they retrogress. But I expect at least 5 more years.

For EB1 - probably Oct.

For EB2/3 -- likely 15 years or more...