By the end of 2016, every continent had installed at least 1 GW, at least 24 countries had 1 GW or more of capacity, and at least 114 countries had more than 10 MW.
The forecast for 2020 is an optimistic scenario: the installed capacity of photovoltaic solar grows up to 700 GW, meaning, it may triple in only 5 years.
From 2014 until today the investment in solar photovoltaic is the largest of all renewable sources.
And this is even more significant since the prices of the modules have declined more than 75% since then.
In many countries solar photovoltaic is already the cheapest source of electricity generation. There are even recent contests in which it appears as more competitive in terms of electricity tariff to inject into the grid than the wind.