Looking on the internet deeply has found these results:

I do it since 2001 is the most popular phrase on the web.

I've been doing it since 2001 127,000 results on the web	I do it since 2001 197,500,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Been doing it since he was governor. It's an old trick, I've been doing it since we were little. I just leave my body. They've been doing it since forever, so... I've been doing it since I was a kid. I've been doing it since Bryan's accident. Every bellefleur woman's been doing it Since they started having them before the revolutionary war. I've been doing it since I was a kid and it's just not making me happy. I've been doing it since I had teeth.	Since 2001 I am also responsible for local government financing and I dispose of part of a 5.000.000.000 EUR Budget. which I had the honour to pilot through this House Likewise, minimum procedural guarantees for the European Arrest Warrant Since 2001 I supervise Department of Games of Chance and Betting in the Ministry of Finance, holding legal duties of the Minister of Finance. Figure 3: Progress in Implementation since 2001 for electricity networks. Accumulated losses on operating activities since 2001 have led to significant indebtedness. have been held up in the Council since 2001. Since 2001 I have been the President of SACE, the Italian Export Credit Agency, and member of the Boards of Finmeccanica SpA and MTS.

I've been doing it since 2001

127,000 results on the web

I do it since 2001

197,500,000 results on the web

More popular!

Been doing it since he was governor.
It's an old trick, I've been doing it since we were little. I just leave my body.
They've been doing it since forever, so...
I've been doing it since I was a kid.
I've been doing it since Bryan's accident.
Every bellefleur woman's been doing it Since they started having them before the revolutionary war.
I've been doing it since I was a kid and it's just not making me happy.
I've been doing it since I had teeth.

Since 2001 I am also responsible for local government financing and I dispose of part of a 5.000.000.000 EUR Budget.
which I had the honour to pilot through this House
Likewise, minimum procedural guarantees for the European Arrest Warrant
Since 2001 I supervise Department of Games of Chance and Betting in the Ministry of Finance, holding legal duties of the Minister of Finance.
Figure 3: Progress in Implementation since 2001 for electricity networks.
Accumulated losses on operating activities since 2001 have led to significant indebtedness.
have been held up in the Council since 2001.
Since 2001 I have been the President of SACE, the Italian Export Credit Agency, and member of the Boards of Finmeccanica SpA and MTS.