The following table shows, in rank order, the 20 subject matters most frequently identified by lobbyists in their registration for this fiscal year. The remaining three columns show the rank ordering of subject matters for the three previous fiscal years. This information is based on the registrations that were active on March 31, 2010.
| Subject Matter of Lobbying | 2009–2010 | 2008–2009 | 2007–2008 | 2006–2007 |
|---|---|---|---|---|
| Industry | 1 | 1 | 1 | 1 |
| Taxation and Finances | 2 | 3 | 2 | 2 |
| Environment | 3 | 2 | 3 | 3 |
| International Trade | 4 | 4 | 4 | 4 |
| Health | 5 | 5 | 5 | 5 |
| Science and Technology | 6 | 6 | 6 | 6 |
| Transportation | 7 | 7 | 7 | 7 |
| Consumer Issues | 8 | 8 | 8 | 8 |
| Infrastructure | 9 | 12 | 13 | 14 |
| Energy | 10 | 9 | 10 | 10 |
| Employment and Training | 11 | 10 | 9 | 9 |
| Government Procurement | 12 | 13 | 12 | 12 |
| Regional Development | 13 | 11 | 11 | 11 |
| Agriculture | 14 | 14 | 15 | 19 |
| Aboriginal Affairs | 15 | 17 | 17 | 16 |
| International Relations | 16 | 15 | 14 | 13 |
| Defence | 17 | 18 | 16 | 17 |
| Justice and Law Enforcement | 18 | 19 | – | – |
| Intellectual Property | 19 | 16 | 18 | 15 |
| Internal Trade | 20 | 20 | 19 | 18 |