Genome-In-A-Bottle (GIAB; version 3.3.2) contains 3.21M SNPs on auto+X chromosomes and 0.51M INDELs in 2.58Gb confident regions. The ins:del ratio is 0.92. On the CHM1-CHM13 pacbio assembly (European ancestry), there are 3.57M auto+X SNPs and 0.58M INDELs in 2.71Gb confident regions [reference] with an ins:del ratio 0.99. These give you an idea of relative short INDELs.
For indels longer than 50bp, I would highly recommend to read this paper by Chaisson et al. This call set is constructed from the whole-genome assembly of the CHM1 genome. It is far more comprehensive and probably more accurate than all the other call sets. The following is Table 1 from the paper:
I have to say that the high ins-to-del ratio is surprising to me, but this is what the data tells us. I have done a similar analysis and reached a similar ratio.
PS: These numbers are essentially from one haplotype. They will be higher for a diploid sample.
EDIT: some numbers in the original post are wrong.