Possibly as many as the entire rest of world and soon pulling ahead. Government owned and controlled Chinese telcos are building more fiber home than the entire rest of the world the last few years. The 60M homes connected are not far from the total fiber lines in the entire rest of the world. The OECD includes most of the developed world and counted 56M homes with fiber at the beginning of 2014. There's a fair amount of fiber in places like the UAE so I'm guessing "ROW" remains slightly ahead of China. That won't be true for long.
Dell'oro, one of the top research houses, reports "PON revenue in Q2 reached a record level, with strong growth both in China and the rest of the world." By revenue, 60% of the sales were in China, up 25% over last year. Since Chinese prices are lower, an even larger % of the ports went to the Middle Kingdom. GPON in China is taking over, with EPON sales flat. Strength in China made Huawei and ZTE the world leading vendors.