Vladimir Putin has held power for twenty years now, alternating between the prime minister's seat and the presidency twice. He has made himself so indispensable to Russia's political system that even the speaker of the legislature has mused that "without Putin, there is no Russia." The constitution says he can't serve as president again after his current term ends in 2024 – but he'll find a way to keep power somehow. As he starts to lay those plans, here's a look back at his approval rating over the past two decades.