The numbers have slowly decreased over the years. In 1948 there were a variety of estimates; we don't have an official census, but probably the best figure is from the Jewish Agency, which had an office in Tehran at the time, and they said between 100,000 and 120,000. At one point it went down to 25,000, which is the figure you mention.
There was a census in 2011 and I think it was 8,956, a very specific number. That may be under-reporting because some people may not want to identify as Jewish, but it's probably the best figure we've got right now and that's four years ago, so it's probably even less now.
There is anti-Semitism but it melds with anti-Zionism. If you are prepared to denounce Israel and Zionism maybe you are going to be left alone or you'll be under a cloud of suspicion, but that's all.
The anti-Zionism has gotten worse because of the advent of the state of Israel. There were some anti-Semitic problems in Iran before the advent of the state of Israel just because of the pervasive influence of the Nazi ideology, which spread everywhere, including the Middle East. It just assumed particular vehemence once the advent of the state of Israel occurred. It went through stages. There was a problem in 1948, and there was the Mossadegh government, which was anti-Semitic. He was replaced by the Shah of Iran whose regime was not anti-Semitic. The exodus more or less stopped. Between 1948 and the time when the Shah came to power about 70,000 people had left before he came to power and then the exodus stopped because he was not anti-Zionist, he was not anti-Israel, he was treating the Jewish population properly and people stayed, which I think in itself was also an indication of what was going on there.
Then in 1979 he was gone. During his period about 80,000 people were there. After 1979 it went from 80,000 to about 9,000 now because this regime—even the regime of Mossadegh was bad but certainly not as bad as the current regime. The anti-Semitism and anti-Zionism aren't just a facet of the regime, I view them as central to its core ideology. This is why the regime is there. That's what it's about. It's obviously got other facets—