One not particularly cute graph; no analysis, explanation, nor editorializing.
GDPI is gross domestic private investment.
NDGIC96 is Real Federal Nondefense Gross Investment.
SLINVC96 is Real State & Local Government Gross Investment.
Note that private investment runs at about 7 times the total of government investment at all levels.
Make of it what you will.
H/T to PK.
Cross posted at Retirement Blues.
UPDATE: In comments, Art raises the valid but trivial point that this graph compares nominal GPDI to real govt investment. Oversight on my part.
Here is is again, with GPDI adjusted by the implicit GDP Deflator, indexed to 100 in 2005. This brings the GPDI line down a bit relative to government investment.