CREATE TABLE mill (architect_id INT, id INT, location TEXT, name TEXT, type TEXT, built_year INT, notes TEXT)
CREATE TABLE bridge (architect_id INT, id INT, name TEXT, location TEXT, length_meters FLOAT, length_feet FLOAT)
CREATE TABLE architect (id TEXT, name TEXT, nationality TEXT, gender TEXT)

How many mills of 'Grondzeiler' type are built in each year? Give me the trend, list in descending by the X-axis.
SELECT built_year, COUNT(built_year) FROM mill WHERE type = 'Grondzeiler' ORDER BY built_year DESC
SELECT "built_year", COUNT("built_year") FROM "mill" WHERE "type" = 'Grondzeiler' ORDER BY "built_year" DESC NULLS LAST