The number of stabbings and slashings in the Big Apple is rising — driven by violent incidents in homes, subways and schools, according to NYPD data. There have been 4,493 knifings so far in 2023 as of Sunday, a 6% increase over the 4,237 in the same period of 2022, the data show. At the same time, arrests for cutting crimes have increased nearly 30%, from 2,073 to 2,677, according to cops.