Table:
enterprise size class, 2008
enterprise size class, 2014

between 1 and 4
between 5 and 9
between 10 and 19
between 20 and 49
between 50 and 99
between 100 and 249
between 250 and 499
between 500 and 999
1,000 and above
attrition

%

between 1 and 4
50.0
5.3
0.8
0.2
0.0
0.0
x
x
x
43.7

between 5 and 9
19.9
38.9
10.5
1.2
0.1
0.0
x
x
x
29.2

between 10 and 19
5.1
15.5
43.5
12.1
0.6
0.1
0.0
x
x
23.0

between 20 and 49
2.3
2.6
13.3
51.5
8.6
0.8
0.1
0.0
0.0
20.7

between 50 and 99
1.6
0.9
1.7
16.8
47.7
11.4
0.5
0.1
0.0
19.3

between 100 and 249
1.0
0.8
0.9
2.6
13.4
52.7
7.6
0.7
0.1
20.2

between 250 and 499
0.6
x
x
1.4
1.7
13.8
45.9
11.1
0.9
24.0

between 500 and 999
x
x
x
x
x
x
10.7
48.7
12.1
22.4

1,000 and above
x
x
x
x
x
x
1.4
4.6
65.9
25.9

addition
74.9
14.4
6.3
3.2
0.8
0.3
0.1
0.0
0.0
..

Statement: the size classes "1,000 and above", "between 100 and 249", "between 20 and 49" and "between 1 and 4" have the highest proportion of enterprises that remain in the same size class with 65.9%, 52.7%, 51.5% and 50.0% respectively.
Question: list top 4 enterprise size classes that have the highest proportion of enterprises that remain in the same size class.
Answer: 1,000 and above, between 100 and 249, between 20 and 49, between 1 and 4