What is the lowest number of carriers?
CREATE TABLE "profiles" (
  "profile" text,
  "bandwidth_m_hz" text,
  "number_of_carriers" real,
  "carrier_bandwidth_k_hz" text,
  "power_d_bm" text,
  "max_downstream_throughput_mbit_s" real
);
SELECT MIN("number_of_carriers") FROM "profiles";