Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| # | Stadium | Capacity | City | Country | Domed or Retractable roof |
| --- | --- | --- | --- | --- | --- |
| 1 | Wembley Stadium | 90,000 | London, England | United Kingdom | RR *only covers seats, playing surface uncovered at all times |
| 2 | AT&T Stadium | 80,000 | Arlington, Texas | United States | RR |
| 3 | Millennium Stadium | 74,500 | Cardiff | Wales | RR |
| 4 | University of Phoenix Stadium | 73,719 | Glendale, Arizona | United States | RR; retractable playing surface |
| 5 | Mercedes-Benz Superdome | 73,208 | New Orleans, Louisiana | United States | D |
| 6 | Reliant Stadium | 71,500 | Houston, Texas | United States | RR |
| 7 | Georgia Dome | 71,228 | Atlanta, Georgia | United States | D |
| 8 | Lucas Oil Stadium | 70,000 | Indianapolis, Indiana | United States | RR |
| 9 | Stade olympique de Montréal | 66,308 | Montreal, Quebec | Canada | D |
| 10 | Edward Jones Dome | 66,000 | St. Louis, Missouri | United States | D |
| 11 | Alamodome | 65,000 | San Antonio, Texas | United States | D |
| 12 | Ford Field | 65,000 | Detroit, Michigan | United States | D |
| 13 | Stadion Narodowy im. Kazimierza Górskiego | 58,145 | Warszawa | Poland | RR |
| 14 | Etihad Stadium | 56,347 | Melbourne | Australia | RR |
| 15 | Arena Națională | 55,600 | Bucharest | Romania | RR |
| 16 | Tokyo Dome | 55,000 | Tokyo | Japan | D |
| 17 | BC Place | 54,500 | Vancouver, British Columbia | Canada | RR |
| 18 | Friends Arena | 54,329 | Solna, Stockholm | Sweden | RR |
| 19 | Safeco Field | 54,097 | Seattle, Washington | United States | RR |
| 20 | Veltins-Arena | 53,951 | Gelsenkirchen | Germany | RR; retractable playing surface |
| 21 | Sapporo Dome | 53,845 | Sapporo | Japan | D; retractable playing surface |
| 22 | Türk Telekom Arena | 52,647 | Istanbul | Turkey | RR |
| 23 | Commerzbank-Arena | 52,300 | Frankfurt | Germany | RR |
| 24 | Rogers Centre | 52,230 | Toronto, Ontario | Canada | RR |
| 25 | Amsterdam ArenA | 51,628 | Amsterdam | Netherlands | RR |
| 26 | Esprit Arena | 51,500 | Düsseldorf | Germany | RR |
| 27 | Stade Pierre-Mauroy | 50,186 | Lille | France | RR |
| 28 | Carrier Dome | 49,262 | Syracuse, New York | United States | D |
| 29 | Chase Field | 49,033 | Phoenix, Arizona | United States | RR |
| 30 | Tropicana Field | 45,369 | St. Petersburg, Florida | United States | D |
| 31 | Toyota Stadium | 45,000 | Toyota | Japan | RR |
| 32 | Miller Park | 42,200 | Milwaukee, Wisconsin | United States | RR |
| 33 | Minute Maid Park | 40,950 | Houston, Texas | United States | RR |
| 34 | Nagoya Dome | 40,500 | Nagoya | Japan | D |
| 35 | Ōita Stadium | 40,000 | Ōita | Japan | RR |
| 36 | Marlins Ballpark | 37,000 | Miami, Florida | United States | RR |
| 37 | Osaka Dome | 36,477 | Osaka | Japan | D |
| 38 | Fukuoka Dome | 35,695 | Fukuoka | Japan | RR |
| 39 | Seibu Dome | 35,655 | Tokorozawa | Japan | RR |
| 40 | Ordos Stadium | 35,107 | Ordos | China | RR |
| 41 | Parken Stadion | 38,065 | Copenhagen | Denmark | RR |
| 42 | GelreDome | 32,500 | Arnhem | Netherlands | RR; retractable playing surface |
| 43 | Nantong Stadium | 32,244 | Nantong | China | RR |
| 44 | Forsyth Barr Stadium at University Plaza | 30,748 | Dunedin | New Zealand | D |
| 45 | Astana Arena | 30,000 | Astana | Kazakhstan | RR |
| 46 | Tele2 Arena | 30,000 | Stockholm | Sweden | RR |
| 47 | Tacoma Dome | 23,000 | Tacoma, Washington | United States | D |
| 48 | Fargodome | 19,000 | Fargo, North Dakota | United States | D |
| 49 | Walkup Skydome | 16,230 | Flagstaff, Arizona | United States | D |
| 50 | Kibbie Dome | 16,000 | Moscow, Idaho | United States | D |
| 51 | Alerus Center | 13,500 | Grand Forks, North Dakota | United States | D |
| 52 | Holt Arena | 12,000 | Pocatello, Idaho | United States | D |
| 53 | DakotaDome | 10,000 | Vermillion, South Dakota | United States | D |
| 54 | UNI-Dome | 10,000 | Cedar Falls, Iowa | United States | D |
| 55 | ETSU/Mountain States Health Alliance Athletic Center | 8,539 | Johnson City, Tennessee | United States | D |
| 56 | Superior Dome | 8,432 | Marquette, Michigan | United States | D |
| 57 | Round Valley Ensphere | 5,500 | Eagar, Arizona | United States | D |
Question:
which country has the smallest capacity stadium?
Answer:
United States