To have proper statistics you need to have quanta. Since there are no, nada, zilch foreign tourists to Pakistan you can't have statistics. These so called "British" vistors to Islamabad are people like me and the other million British Pakistanis who go back to keep alive their connection with their country of heritage.
A country that is sold as just a refuge for Indian Muslims is going to attract the odd Bin Laden, few Al-Baghdadis, couple of million Indian Muslims, another few million Banglas and few more Rohinghyas to enrich; enlarge the slums in Karachi. That about sums it really.
And any foreigner who wants to taste the flavours of the sub-continent heads to India. That is the real McCoy. The real deal. At least that is how the world at least percieves it. And that is what matters.