Hi there, you mention the country that's acquiring is from india.
please note 2 things,
1. Immigration from India to the US is much more tenious than other countries due to the number of immigrant applications and population. Im from Malaysia and were only 25 million of us and 6 million foreigners and we hardly have people that come to the US on immigrant visas. if Malaysians immigrate , they come to Australia or sometimes Canada.
2. Filing for India cases take long time due to the visa bulletin charts.
With Indians, it's usually chain migration to the US. And the huge population you cite is the primary determinant for Indian nationals' intent to migrate. Those who can't get to the US (or Canada) seek to go to Aus/NZ. But the US is the primary migration destination of choice.