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:
| Represent | Contestant | Age | Height | Hometown |
| --- | --- | --- | --- | --- |
| 1 | Mildred Kincaid Adames | 20 | 1.65 mts | Panama City |
| 2 | Catherine Henderson Tudisco | 20 | 1.66 mts | Panama City |
| 3 | Giovanna Alida Loaiza | 21 | 1.67 mts | Panama City |
| 4 | Reyna Royo | 24 | 1.69 mts | Panama City |
| 5 | Ivonne Ileana Correa Turney | 23 | 1.70 mts | Panama City |
| 6 | Karol Guevara | 22 | 1.70 mts | Panama City |
| 7 | Betzy Janette Achurra Castillo | 20 | 1.70 mts | Panama City |
| 8 | Marisela Moreno Montero | 24 | 1.73 mts | Panama City |
| 9 | Patricia De León | 19 | 1.74 mts | Panama City |
| 10 | Marichelle Julieta Ruiz Leone | 20 | 1.74 mts | Panama City |
| 11 | Betsy Milena Batista | 21 | 1.75 mts | Panama City |
| 12 | Lourdes Rodriguez | 21 | 1.75 mts | Panama City |
| 13 | Janessy Jasiell Contreras Ibarra | 18 | 1.75 mts | Panama City |
| 14 | Gina Larissa Correa Hils | 20 | 1.76 mts | Panama City |
| 15 | Swany Cisney Castillo | 23 | 1.78 mts | Panama City |
| 16 | Michelle Krisko Sugasti | 20 | 1.80mts | Panama City |
Question:
how many contestants are 20 years old?
Answer:
6