有关什么东西的官方数据?
Sending countries 是什么意思?
https://en.wikipedia.org/wiki/Immigration_to_the_United_States
USA Top 10 sending countries in 2015 and 2016
Country 2015 2016
1. Mexico 158,619 174,534
2. China 74,558 81,772
3. Cuba 54,396 66,516
4. India 64,116 64,687
5. Dominican Rep.50,610 61,161
6. Philippines 56,478 53,287
7. Vietnam 30,832 41,451
8. Haiti 16,967 23,584
9. El Salvador 19,487 23,449
10. Jamaica 17,642 23,350
Total 1,051,031 1,183,505