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:
| Name | Latitude | Longitude | Diameter (km) | Year named | Name origin |
| --- | --- | --- | --- | --- | --- |
| Agrona Linea | 40.0N | 280.0E | 2,300.0 | 2006.0 | Welsh goddess of slaughter, destroyer of life. |
| Antiope Linea | 40.0S | 350.0E | 0.0 | 1982.0 | Amazon awarded to Theseus. |
| Badb Linea | 14.0N | 15.0E | 1,750.0 | 1997.0 | Irish war goddess. |
| Discordia Linea | 58.0S | 246.5E | 800.0 | 1997.0 | Roman war goddess, close to Bellona. |
| Guor Linea | 20.0N | 0.0E | 0.0 | 1982.0 | Northern European Valkyrie. |
| Hariasa Linea | 19.0N | 15.0E | 0.0 | 1982.0 | German war goddess. |
| Hippolyta Linea | 42.0S | 345.0E | 0.0 | 1982.0 | Amazon queen. |
| Kalaipahoa Linea | 60.5S | 336.5E | 2,400.0 | 1991.0 | Hawaiian war goddess. |
| Kara Linea | 44.0S | 306.0E | 0.0 | 1982.0 | Icelandic Valkryie. |
| Lampedo Linea | 62.2N | 293.0E | 800.0 | 1982.0 | Scythian Amazon queen. |
| Molpadia Linea | 48.0S | 355.0E | 0.0 | 1982.0 | Amazon. |
| Morrigan Linea | 54.5S | 311.0E | 3,200.0 | 1991.0 | Celtic war goddess. |
| Penardun Linea | 54.0S | 344.0E | 975.0 | 1991.0 | Celtic sky goddess. |
| Sarykyz Linea | 77.3S | 200.0E | 370.0 | 1997.0 | Uzbek evil spirit. |
| Sui-ur Linea | 61.0S | 260.0E | 700.0 | 1997.0 | Mansi (Ob River Ugra) wife of war god. |
| Veleda Linea | 10.0S | 213.0E | 1,350.0 | 2003.0 | Warrior goddess of the continental Celts. |
| Vihansa Linea | 54.0N | 20.0E | 0.0 | 1982.0 | German war goddess. |
Question:
How many years have a longitude measure of 20.0e?
Answer:
1.0