Your data is a year old and only considers government entities, excluding private investors both in and out of the US. I remain unconvinced, but I've got PMs, bitcoin, land, and marketable skills so I should be fine if I'm wrong.
That was the data requested, foreign purchases. It includes all foreign..
It is from the treasury report. The latest data is there, in the link provided, but maybe you are in our future.
They also have domestic data, but you can look it up yourself, now that you know that it is there. Make the graph that suits you best.
NET PURCHASES OF U.S. TREASURY BONDS & NOTES BY MAJOR FOREIGN SECTOR:
FOREIGN OFFICIAL INSTITUTIONS, OTHER FOREIGNERS, AND
INTERNATIONAL & REGIONAL ORGANIZATIONS
(IN MILLIONS OF DOLLARS)
(NEGATIVE FIGURES INDICATE NET SALES BY FOREIGNERS TO U.S. RESIDENTS
OR A NET OUTFLOW OF CAPITAL FROM THE UNITED STATES)
TOTAL INTERNATIONAL
NET FOREIGN AND
FOREIGN OFFICIAL OTHER REGIONAL
MONTH PURCHASES INSTITUTIONS FOREIGNERS ORGANIZATIONS
------- --------------- ------------ ------------ ---------------
2013-03 5,289 -16,816 25,750 -3,645
2013-02 2,614 -6,697 8,315 996
2013-01 32,302 53,128 -23,075 2,249
2012-12 29,893 8,366 19,974 1,553
2012-11 28,085 -1,697 30,401 -619
2012-10 12,043 7,841 3,834 368
2012-09 -17,492 919 -22,127 3,716