Figure 19.3: U.S. Net Capital Outflows: 1970-2015 (Index, 2007 =100) 
-Figure 19.3 shows U.S. net capital outflows from 1970-2015. Given this data, discuss the trade balance over this period. What relationship between net capital outflows and net exports did you use?
Definitions:
Macrophages
A type of lymphocytes that attacks invading organisms.
Immune System Organs
Organs involved in the body's defense against pathogens, including the thymus, spleen, lymph nodes, and bone marrow.
Liver
The largest gland in the body; it aids digestion by producing bile, regulates organic components of the blood, and acts as a detoxifier of blood.
Thymus
An organ located near the heart that secretes thymosin and thus processes and activates T-cells.
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