Table:
rank
island
local authority
population

c. 1801
1841
1891
1931
1961
1981
2001
2011

1
lewis and harris
na h-eileanan siar
12,164
20,046
30,726
28,042
24,107
22,476
19,918
21,031

2
mainland, shetland
shetland
none
20,572
19,741
15,172
13,282
17,722
17,550
18,765

3
mainland, orkney
orkney
none
16,022
16,498
13,352
13,495
14,000
15,315
17,162

4
skye
highland
14,470
23,082
15,705
9,908
7,479
7,276
9,232
10,008

5
bute
argyll and bute
4,759
7,147
11,735
12,112
9,793
7,306
7,228
6,498

6
arran
north ayrshire
5,804
6,241
4,730
4,506
3,700
3,845
5,045
4,629

7
islay
argyll and bute
9,500
15,772
7,375
4,970
3,860
3,792
3,457
3,228

8
mull
argyll and bute
8,016
8,316
4,691
2,903
2,154
2,197
2,667
2,800

9
south uist
na h-eileanan siar
none
5,093
3,708
2,810
2,376
2,231
1,818
1,754

10
great cumbrae
north ayrshire
509
1,413
1,784
2,144
1,638
1,300
1,434
1,376

none
total
none
none
123,704
116,693
95,919
81,884
82,145
83,664
87,251

none
change
none
none
none
5.7%
7.8%
14.6%
+0.3%
+1.8%
+4.3%

Statement: mainland island is the second most populous of the scottish islands, and had 18,765 residents in 2011 compared to 17,550 in 2001.
Question: list the rank of mainland island.
Answer: [2.0]