This is the information on music sales in 2016 and 2017, published January 2018. As far as I am aware 2018 figures will be published early January 2019.
It will be interesting to see what changes,if any, are shown in the stats.
Of course statistics, to me, never seem to tell the whole story.
https://www.theguardian.com/business...or-two-decades
General trends seem to be, streaming the largest, next physical media and then digital media. physical media still dominated by CD sales but they are falling, both cassette and vynl growing but the numbers for both are still quite small. A growth of 43% for cassettes but the total was only 22,000.
Digital media saw a big drop, probably those buying from Amazon and iTunes etc moving to streaming.
See if the latest figures are published in the next few weeks.