Etherscan provides this statistics, about the chain data size with fast synchronization. I cannot understand if it refers only to the blockchain size (i.e. block headers + block bodies, i.e. transactions) or it includes also the state.
I can't speak to this specific chart but if you fast sync a Geth node the final result does include the state. So, I assume that this chart does include the state. It only includes the most recent state though.