Used data shown in the table for 'Number of active nodes' and 'Transactions per second (txs/s)' are from beginning of April 2018.
''Transaction load of blockchain network (Kb/s)' is presented as multiplication between 'Transactions per second (txs/s)' and 'Estimated average transaction size (Kbytes)'.
For some of the coins where there are none information on internet to check Average transaction size in Kbytes (for an example Ripple transactions can be found here: https://xrpcharts.ripple.com/#/transactions/2BAC83395389A8A97B4ADBFC215D98FF02284A4DE9635B237CDAB83E25F8E98D ) I used following website https://mothereff.in/byte-counter for calculation of raw data size of few transactions and get value as 'Estimated average transaction size in (Kbytes)'.
We can see that 'Transaction load of blockchain network (Kb/s)' is up to around 6.5 (Kb/s) for Ripple, that has to be shared to 55 full nodes. That means that all of those coins blockchain networks are not so many loaded and can be used for significantly bigger number of transactions if there is need for that.