According to the British Coffee Association around 2,000,000,000 cups of coffee are consumed worldwide every day.
(According to market researchers, Mintel, in the UK we drink over 70 million cups a day, but 3/4 (74%) of all UK adults drink instant coffee, compared to around 1/2 (48%) who drink fresh coffee.
I stopped drinking instant when I left England, and I've never wanted to go back to the brown sludge.)