Question: How many items were under ranking l.a.(2) when the world ranking was 21st?
SQL: SELECT COUNT("Ranking L.A. (2)") FROM "1-19948664-2" WHERE "World Ranking (1)" = '21st';

Question: What was the author/editor/source when the l.a. ranking was 1st?
SQL: SELECT "Author / Editor / Source" FROM "1-19948664-2" WHERE "Ranking L.A. (2)" = '1st';

Question: How many years were listed under index when there were 157 countries sampled?
SQL: SELECT COUNT("Index (Year)") FROM "1-19948664-2" WHERE "Countries sampled" = 157.0;

Question: What was the publication year ranking l.a. is 1st?
SQL: SELECT "Year of publication" FROM "1-19948664-2" WHERE "Ranking L.A. (2)" = '1st';

Question: How many years were recorded when world ranking was 21st?
SQL: SELECT COUNT("Index (Year)") FROM "1-19948664-2" WHERE "World Ranking (1)" = '21st';