Table:
population of immigrants

percent
number

total, both sexes
31
1,566,900

1 to 10 years
2
93,700

11 to 20 years
2
115,100

21 to 30 years
4
189,300

31 to 40 years
4
175,600

over 40 years
20
993,300

total, men
31
731,100

1 to 10 years
2
41,300

11 to 20 years
2
51,000

21 to 30 years
4
84,400

31 to 40 years
4
81,500

over 40 years
20
473,000

total, women
31
835,800

1 to 10 years
2
52,400

11 to 20 years
2
64,100

21 to 30 years
4
104,800

31 to 40 years
4
94,100

over 40 years
19
520,300

Statement: overall, 20% of whom (about two-thirds) were senior immigrants who landed over 40 years ago in 2016.
Question: overall, what is the percentage of whom were senior immigrants who landed over 40 years ago in 2016?
Answer: [20.0]