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:
| Ranking | Company | Industry | Revenue (USD billions) | FY | Capitalization (USD billions) | Employees | Listing | Headquarters | CEO |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | Wal-Mart Stores, Inc. | Retail | $469 | January 31, 2013 | $248 | 2,200,000 | NYSE: WMT | Bentonville, Arkansas | Doug Mcmillon |
| 2 | Royal Dutch Shell | Oil and gas | $467 | December 31, 2012 | $132 | 90,000 | LSE: RDSA | The Hague; London | Ben van Beurden |
| 3 | Exxon Mobil Corporation | Oil and gas | $453 | December 31, 2012 | $406 | 76,900 | NYSE: XOM | Irving, Texas | Rex W. Tillerson |
| 4 | China National Petroleum Corporation | Oil and gas | $425 | December 31, 2012 |  | 1,668,072 | — | Beijing | Zhou Jiping |
| 5 | Sinopec Group | Oil and gas | $411 | December 31, 2012 | $81 | 401,000 | NYSE: SNP | Beijing | Wang Tianpu |
| 6 | BP | Oil and gas | $379 | December 31, 2013 | $89 | 83,900 | LSE: BP | London | Bob Dudley |
| 7 | Saudi Aramco | Oil and gas | $311 | 2012 |  | 54,041 | — | Dhahran | Khalid A. Al-Falih |
| 8 | Vitol | Commodities | $303 | January 10, 2013 |  | 2,800 | — | Rotterdam; Geneva | Ian Taylor |
| 9 | State Grid Corporation of China | Electric utility | $290 | 2012 |  | 1,564,000 | — | Beijing | Liu Zhenya |
| 10 | Samsung | Conglomerate | $268 | December 31, 2014 |  | 427,000 | KRX: 005930; KRX: 005935 | Samsung Town | Lee Kun-hee |
| 11 | Volkswagen Group | Automotive | $254 | December 31, 2012 | $77 | 502,000 | ISIN: DE0007664005 | Wolfsburg | Martin Winterkorn |
| 12 | Chevron | Oil and gas | $242 | December 31, 2012 | $211 | 61,000 | NYSE: CVX | San Ramon, California | John Watson |
| 13 | Total | Oil and gas | $240 | December 31, 2013 | $120 | 111,000 | Euronext: FP | Courbevoie | Christophe de Margerie |
| 14 | Toyota | Automotive | $222 | March 31, 2013 | $149 | 326,000 | TYO: 7203; NYSE: TM | Toyota, Aichi | Akio Toyoda |
| 15 | Glencore Xstrata | Commodities | $214 | December 31, 2012 | $41.66 | 58,000 | LSE: GLEN; SEHK: 0805 | Baar | Ivan Glasenberg |
| 16 | Phillips 66 | Oil and gas | $182 | December 31, 2012 | $39 | 13,500 | NYSE: PSX | Houston, Texas | Greg Garland |
| 17 | E.ON | Electric utility | $174 | December 31, 2012 | $47 | 79,000 | FWB: EOAN | Düsseldorf | Johannes Teyssen |
| 18 | Apple | Electronics | $170 | September 28, 2013 | $410 | 76,000 | NASDAQ: AAPL | Cupertino, California | Tim Cook |
| 19 | Japan Post Holdings | Conglomerate | $168 | March 31, 2013 |  | 229,000 | — | Tokyo | Jiro Saito |
| 20 | Eni | Oil and gas | $167 | December 31, 2012 | $94 | 78,000 | BIT: ENI | Rome | Paolo Scaroni |
| 21 | Gazprom | Oil and gas | $164 | December 31, 2012 | $145 | 432,000 | MCX: GAZP | Moscow | Alexei Miller |
| 22 | Berkshire Hathaway | Conglomerate | $162 | December 31, 2012 | $201 | 217,000 | NYSE: BRKA; NYSE: BRKB | Omaha, Nebraska | Warren Buffett |
| 23 | General Motors | Automotive | $152 | December 31, 2012 | $40 | 284,000 | NYSE: GM | Detroit, Michigan | Daniel Akerson |
| 24 | Daimler | Automotive | $150 | December 31, 2012 | $64 | 275,087 | FWB: DAI | Stuttgart | Dieter Zetsche |
| 25 | General Electric | Conglomerate | $147 | December 31, 2012 | $212 | 287,000 | NYSE: GE | Fairfield, Connecticut | Jeffrey Immelt |
| 26 | Kuwait Petroleum Corporation | Oil and gas | $145 | March 31, 2012 |  | 17,927 |  | Kuwait City | Saad Al Shuwaib |
| 27 | Petrobras | Oil and gas | $144 | December 31, 2012 | $171 | 81,000 | Bovespa: PETR3; Bovespa: 4 | Rio de Janeiro | Maria das Graças Foster |
| 28 | Allianz | Financial services | $140 | December 31, 2012 | $54 | 142,000 | ISIN: DE0008404005 | Munich | Michael Diekmann |
| 29 | Valero Energy | Oil and gas | $139 | December 31, 2012 | $16 | 22,000 | NYSE: VLO | San Antonio, Texas | William R. Klesse |
| 30 | Lukoil | Oil and gas | $139 | December 31, 2012 | $51 | 120,000 | MCX: LKOH | Moscow | Vagit Alekperov |
| 31 | Cargill | Food processing | $136 | May 31, 2013 |  | 158,000 | — | Wayzata, Minnesota | Gregory R. Page |
| 32 | Hon Hai Precision Industry | Electronics | $134 | December 31, 2012 | $41 | 1,290,000 | TWSE: 2317 | Tucheng | Terry Gou |
| 33 | Ford Motor Company | Automotive | $134 | December 31, 2012 | $47 | 164,000 | NYSE: F | Dearborn, Michigan | Alan Mulally |
| 34 | Trafigura | Commodities | $133 | September 30, 2013 |  | 8,773 | — | Lucerne | Claude Dauphin |
| 35 | Statoil | Oil and gas | $130 | December 31, 2012 | $86 | 23,000 | OSE: STL | Stavanger | Helge Lund |
| 36 | GDF Suez | Electricity and gas utility | $128 | December 31, 2012 | $58 | 161,000 | Euronext: SZE | Paris | Gérard Mestrallet |
| 37 | AT&T | Telecommunications | $127 | December 31, 2012 | $185 | 256,000 | NYSE: T | Dallas, Texas | Randall L. Stephenson |
| 38 | Pemex | Oil and gas | $127 | December 31, 2012 |  | 138,000 | — | Mexico City | Juan José Suárez Coppel |
| 39 | PDVSA | Oil and gas | $124 | December 31, 2012 |  | 121,000 | — | Caracas | Rafael Ramírez |
| 40 | CVS Caremark | Retail | $123 | December 31, 2012 | $59 | 202,000 | NYSE: CVS | Woonsocket, Rhode Island | Larry J. Merlo |
| 41 | McKesson | Pharmaceuticals | $122 | March 31, 2013 | $22 | 32,000 | NYSE: MCK | San Francisco, California | John Hammergren |
| 42 | JX Holdings | Oil and gas | $119 | March 31, 2013 | $16 | 24,000 | TYO: 5020 | Tokyo | — |
| 43 | AXA | Financial services | $118 | December 31, 2012 | $39 | 240,000 | Euronext: CS | Paris | Henri de Castries |
| 44 | Assicurazioni Generali | Financial services | $116 | December 31, 2012 | $24 | 85,000 | BIT: G | Trieste | Sergio Balbinot; Giovanni Perissinotto |
| 45 | Verizon | Telecommunications | $115 | December 31, 2012 | $108 | 203,000 | NYSE: VZ | New York City, New York | Ivan Seidenberg |
| 46 | Koch Industries | Conglomerate | $115 | December 31, 2012 |  | 60,000 | — | Wichita, Kansas | Charles Koch |
| 47 | Nippon Telegraph and Telephone | Telecommunications | $113 | March 31, 2013 | $73 | 205,000 | TYO: 9432 | Tokyo | Norio Wada |
| 48 | SK Group | Conglomerate | $112 | December 31, 2012 |  | 52,377 | KRX: 003600 | Seoul | Choi Tae-Won |
| 49 | Hewlett-Packard | Information Technology | $112 | October 31, 2013 | $47 | 267,000 | NYSE: HPQ | Palo Alto, California | Meg Whitman |
| 50 | Enel | Electric utility | $111 | December 31, 2012 | $34 | 59,000 | BIT: ENEL | Rome | Fulvio Conti |
| 51 | Fiat | Automotive | $110 | December 31, 2012 | $7 | 214,836 | BIT: F | Turin | Sergio Marchionne |
| 52 | UnitedHealth Group | Health care | $110 | December 31, 2012 | $62 | 99,000 | NYSE: UNH | Minnetonka, Minnesota | Stephen Hemsley |
| 53 | Tesco | Retail | $110 | February 23, 2013 | $42 | 493,000 | LSE: TSCO | Cheshunt, Hertfordshire | Philip Clarke |
| 54 | National Iranian Oil Company | Oil and gas | $110 | 2011 |  | 36,000 | — | Tehran | Bijan Namdar Zangeneh |
| 55 | Tata Group | Conglomerate | $105 | March 31, 2014 | $109 | 455,000 | FWB: BMW | Mumbai | Cyrus Pallonji Mistry |
| 55 | Honda | Automotive | $104 | March 31, 2013 | $69 | 181,876 | TYO: 7267 | Tokyo | Takanobu Ito |
| 56 | IBM | Information Technology | $104 | December 31, 2012 | $242 | 433,000 | NYSE: IBM | Armonk, New York | Ginni Rometty |
| 57 | BASF | Chemicals | $103 | December 31, 2012 | $80 | 113,262 | FWB: BAS | Ludwigshafen | Kurt Bock |
| 58 | Costco | Retail | $102 | September 1, 2013 | $39 | 132,000 | NASDAQ: COST | Issaquah, Washington | W. Craig Jelinek |
| 59 | Siemens | Conglomerate | $102 | September 30, 2013 | $92 | 405,000 | FWB: SIE | Munich | Josef Käser |
| 60 | Nissan Motor Company | Automotive | $102 | March 31, 2013 | $48 | 128,000 | TYO: 7201 | Yokohama | Carlos Ghosn |
| 61 | Carrefour | Retail | $101 | December 31, 2012 | $17 | 476,000 | Euronext: CA | Levallois-Perret | Georges Plassat |
| 62 | Rosneft | Oil and gas | $101 | December 31, 2012 | $75 | 166,100 | MCX: ROSN | Moscow | Igor Sechin |
| 63 | Cardinal Health | Pharmaceuticals | $101 | June 30, 2013 | $14 | 40,000 | NYSE: CAH | Dublin, Ohio | George Barrett |
| 64 | BMW | Automotive | $100 | March 17, 2013 | $58.8 | 105,876 | FWB: BMW | Munich | Norbert Reithofer |
| 65 | Nestlé | Food processing | $100 | December 31, 2012 | $207 | 339,000 | SIX: NESN | Vevey | Paul Bulcke |
Question:
how many oil and gas industries made the top 10 in ranking of revenue list?
Answer:
6