It is considered proprietary information, but some rough estimates are often quoted publicly by the park.
SDC's attendance is over 2 million, I would estimate closer to 2.25 million, but that's speculative.
They definitely wouldn't give you a break down of guest visitor amounts, that's expensive info for any potential competing attraction.
The 2.25 million figure is already referring to individual gate entries.
Branson is estimated to have about 8 million visitors a year.