From: Causes of different goiter rates with the same iodine deficiency among the pastoral and agricultural populations of Tibet: a geographical comparison
year
UIC (μg/L)
Goiter rate (%)
Pastoral area
Agricultural area
1985
40.0
55
–a
40
2002
42.2
132.9
8.9
13.5
2009
50.2
193.2
2.0
16.0
2011
68.1
187.2
1.5
2.8