There is levied a tax on the privilege of engaging in the following vocations, professions, businesses, or occupations:
(1) Persons registered as lobbyists pursuant to § 3-6-302;
(2) Persons licensed or registered under title 48, chapter 1 as: Agents;
(3) Broker-dealers; and
(4) Investment advisers;
(5) Persons licensed or registered under title 63 as: Osteopathic physicians; and
(6) Physicians; and
(7) Persons licensed as attorneys by the supreme court of Tennessee.