回複：回美背景調查要多久

Visa Questionnaire Statistics
As of December 22, 2003

Number of total cases reported to IVO: 1017
Number of cases for which IVO has provided assistance: 840

Statistics for 840 cases
34% pending (290 active cases)
66% closed (550 closed cases)

Statistics for closed cases (550)

• 89% Visas approved

• 5% Visas delayed/canceled/not received in time for scheduled trip

• 4% Other/outcome not known

• 2% Visas denied

Visa Processing Times

Average wait time for cases that are still pending: 155 days (5 months)
Average processing time for approved cases: 142 days (4.7 months)

Statistics for all 1017 cases reported to IVO
Average Age
31


Type of Visa
Percentage

F-1 student
49%

B1/B2 visitor for business/tourism
19%

H-1B temporary specialty worker
17%

J-1 exchange visitor
11%

Other
4%

Unknown/Not Answered
1%




Category of Applicant
Percentage

Graduate student
48%

Postdoctoral student/research scientist
17%

Professional
12%

Undergraduate student
5%

Faculty
5%

Unknown/Not Answered
5%

Other
3%

Research Scientist
2%

Government Employee
2%




Gender
Percentage

Male
63%

Female
32%

Unknown/Not Answered
6%


Field of Research or Study
Percentage

Biosciences/Medicine/Health
30%

Engineering/Materials Science
26%

Physical Sciences/Mathematics
23%

Chemical Sciences
9%

Computer/Information Science
7%

Not Answered
2%

Geosciences
2%

Non-science
1%

Social Sciences
1%

http://www7.nationalacademies.org/visas/Visa_Statistics.html