| 年份 | 中国百强收入 | 四大事务所收入 | 四大事务所占比 |
| 2002 | 443,114 | 163,854 | 37% |
| 2003 | 522,714 | 203,971 | 39% |
| 2004 | 710,819 | 324,898 | 46% |
| 2005 | 929,629 | 459,815 | 49% |
| 2006 | 1,180,941 | 625,906 | 53% |
| 2007 | 1,646,770 | 901,075 | 55% |
| 2008 | 1,967,212 | 1,038,917 | 53% |
| 2009 | 2,061,051 | 913,042 | 44% |
| 2010 | 2,310,383 | 951,687 | 41% |
| 2011 | 2,788,763 | 1,009,109 | 36% |
| 2012 | 3,144,855 | 1,064,302 | 34% |
| 2013 | 3,441,558 | 1,094,416 | 32% |