CREATE TABLE "macro_economic_trend" (
  "year" real,
  "gross_domestic_product" real,
  "us_dollar_exchange" text,
  "inflation_index_2000_100" real,
  "per_capita_income_as_pct_of_usa" real
);

Question: What year before 1980 has is the highest Inflation Index (2000=100)?
SQL: SELECT MAX("inflation_index_2000_100") FROM "macro_economic_trend" WHERE "year"<1980;