For every 100 kids born in Santo Domingo alone 40 are Haitian national, so do the math. 10 years ago it was in the 3 Million according to most stat other than ngo. Now the number is close to 5 Million.
http://elnacional.com.do/40-ninos-nacen-en-el-gran-sd-son-haitianos/
http://elnacional.com.do/40-ninos-nacen-en-el-gran-sd-son-haitianos/