I summarized the total number of trade nodes, number of provinces, base tax, and goods produced capable of going to each trade node. I sorted them by number of goods produced in each trade node + all nodes upstream from it. I took care in avoiding duplication.
GP Rank = Nodes ranked by #GP
#Base Tax = Sum of base tax in the node and all nodes upstream from it
#Provinces = Same as above, but for provinces.
#Nodes = Same as above, but for number of trade nodes.
#GP = Same as above, but for goods produced.
Just in case you ever wondered about the exact numbers.
Interesting note: The only non end-node not leading to the English Channel is Safi.
GP Rank = Nodes ranked by #GP
#Base Tax = Sum of base tax in the node and all nodes upstream from it
#Provinces = Same as above, but for provinces.
#Nodes = Same as above, but for number of trade nodes.
#GP = Same as above, but for goods produced.
Just in case you ever wondered about the exact numbers.
Interesting note: The only non end-node not leading to the English Channel is Safi.