For End of Fiscal Years past 1980 that also have as % of GDP Low-High of 83.4-84.4, and a Debt Held By Public ($Billions) smaller than 7,552 what would be the average Gross Debt in $Billions undeflated Treas. in said years?
CREATE TABLE "deficit_spending" (
  "end_of_fiscal_year" real,
  "gross_debt_in_billions_undeflated_treas" real,
  "as_pct_of_gdp_low_high" text,
  "debt_held_by_public_billions" real,
  "as_pct_of_gdp_treas_mw_omb_or_omb_mw" real,
  "gdp_billions_omb_bea_est_mw_com" text
);
SELECT AVG("gross_debt_in_billions_undeflated_treas") FROM "deficit_spending" WHERE "end_of_fiscal_year">1980 AND "as_pct_of_gdp_low_high"='83.4-84.4' AND "debt_held_by_public_billions"<'7,552';