That's correct. 2017 ended with 3,733,000,000 in restricted to be exact. If you follow the 144's Curtis has sold 2 blocks which leaves 3,643,479,974...which is 60.7% of 6B A/S controlling interest.
FYI, the 2 blocks sold were 34,520,026 (6/19) and 55,000,000 (9/20).
But those are still captured as part of the O/S and aren't added to the O/S pool like when dilution occurs.