I don't think I've seen 1990? You could make a case for 1991 or 1992, but I don't see how anyone could have been using the web in 1990 when it hadn't been even initially implemented yet?
For example, see "The Original HTTP as defined in 1991": https://www.w3.org/Protocols/HTTP/AsImplemented.html
Case in point – in '94 I was in fourth grade at a school that made a big deal of their computer department, and how they were hooked up to the web. When geocities launched ('95?) we were making homepages as school assignments. So many "under construction" images – it was glorious!
It may not have been ubiquitous as it is today, but the web was definitely not out of reach for normal people back in '94.
Of course there's a wikipedia article on this, which counts 10k+ web sites at the end of that year: https://en.wikipedia.org/wiki/List_of_websites_founded_befor...
For most applications you would dial up a remote system anyway so many used the web by way of plain terminal software. The Lynx web browser had existed for just over two years by then and it wasn't the first web client.