What percentage of the world's banks are covered? Or perhaps what percentage of the world's population banks in those covered institutions? Or perhaps what percentage of the total banked wealth (terminology?) is held in covered institutions?
It depends on the audience. Many businesses don't want to restrict themselves exclusively to the subset of UK banks that follow that initiative. And government intervention is hardly a pragmatic solution (how many companies can afford to lobby every government in which they'd like to do business?).
