Level

c

c
_{
r}

n
_{
c}


1

209

106

830

2

65,303

60,603

998,267

3

18,271

17,834

61,748

4

1,544

1,539

5,168

5

10

10

24

Total

85,337

80,092

1,066,037

 c denotes the total number of communities. The number of irreducible communities, which are communities that do not contain any subcommunities, is denoted by c_{r}. n_{c} denotes the number of firms in irreducible communities