You should read both of these:
dailymail.co.uk/news/article-2332338/100-000-Christians-killed-year-faith-says-Vatican-archbishop-Monsignor-Silvano-Maria-Tomasi-Iran-shuts-countrys-biggest-Pentecostal-church-arrests-pastor-mid-service.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490
ucanews.com/news/persecution-kills-150000-christians-every-year/60090
So, in the last few years, 100,000 Christian martyrs every year, is probably a conservative estimate.
No distinction is made between Christians and Catholics. The Catholic Church is the largest denomination in the world, and Catholicism has a much larger and longer presence in the Muslim world, for example, than Protestants do.
powerofk is right to mention all of those nations as problematic, and all share some responsibility of the persecution of Christians. I personally, however, believe that Islam is the biggest threat to Christianity right now. The “Arab Spring” and the surge of Islamic fundamentalism that we have seen since 9/11, are probably responsible for an increase in persecution. Again, IMHO.
Christians endure violent persecution in many countries (133 as the once source says)… but only in a few countries in the Middle East is the situation so bad as to threaten the very existence of Christianity in those places. [Iraq and Syria especially so].
The Church in these places needs our prayers, and also our money.