CREATE TABLE table_202_114 (id DECIMAL, "make/model" TEXT, "series" TEXT, "model" TEXT, "year" DECIMAL, "notes" TEXT)

which buses are the newest in the current fleet ?
SELECT "series" FROM table_202_114 ORDER BY "year" DESC LIMIT 1
SELECT "series" FROM "table_202_114" ORDER BY "year" DESC NULLS LAST LIMIT 1