This data is hard to get without having some form of survey done on each one. And as since BTC is decentralized, it is difficult to survey everyone.
Here is the data we do have:
https://coinshares.com/assets/resources/Research/bitcoin-mining-network-december-2019.pdfI would direct you to pages 8 and 9 which discuss the "energy mix" of bitcoin mining. They reach the conclusion that approximately 73% of bitcoin mining is performed using renewable energy. This is around 4 times higher than the average global renewable energy use.
Mining Rigs would have become more efficient meaning more hashes per KWh. I do not know the eff of state of the art mining rigs.
The Antminer S1 has a hashrate of 180 GH/s while using 360 watts of power -
https://minerstat.com/hardware/antminer-s1The Antminer S19 pro has a hashrate of 110 Th/s (110,000 GH/s) while using 3,250 watts of power -
https://minerstat.com/hardware/antminer-s19-proThis means the Antminer S1 produced 0.5 GH per joule, while the Antminer S19 Pro produces 33.8 GH per joule. This represents a 68 fold increase in efficiency, or conversely, a 98.5% decrease in energy use.