Water projects Investments Comparison

Can someone ​help me find a ​report or a ​website showing ​global ​investment ​trends in ​different types ​of infrastructure?​  ​
In particular,​ I'm ​interested in ​comparing ​investments in ​rural water ​projects to ​other types of ​infrastructure, ​such as urban ​water, ​sanitation, ​telecom, roads, ​etc.

The World Bank ​offers data by ​country, but ​does not ​aggregate by ​region or ​global and many ​countries are ​missing from ​their database. ​  ​

Just rough ​numbers would ​be very helpful!​  ​