You can find that info in main.cpp file of HYPER code, see the row 992 where it says:
// miner's coin stake reward
int64_t GetProofOfStakeReward(const CBlockIndex* pindexPrev, int64_t nCoinAge, int64_t nFees)
{
int64_t nSubsidy = nCoinAge * COIN_YEAR_REWARD1 * 33 / (365 * 33 +

;
if(pindexBest->nTime > 1493596800) //Mon, 01 May 2017 00:00:00 GMT
nSubsidy = (nCoinAge * COIN_MONTH_REWARD1 * 33 / (365 * 33 +

) * 12;
if(pindexBest->nTime > 1586736000) // Mon, 13 Apr 2020 00:00:00 GMT
nSubsidy = (nCoinAge * COIN_MONTH_REWARD2 * 33 / (365 * 33 +

) * 12;
if(pindexBest->nTime > 1744502400) // Sun, 13 Apr 2025 00:00:00 GMT
nSubsidy = (nCoinAge * COIN_MONTH_REWARD3 * 33 / (365 * 33 +

) * 12;
LogPrint("creation", "GetProofOfStakeReward(): create=%s nCoinAge=%d\n", FormatMoney(nSubsidy), nCoinAge);
return nSubsidy + nFees;
}