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:
| Airline | ICAO | IATA | Callsign | Commenced operations | Fleet size | Headquarters |
| --- | --- | --- | --- | --- | --- | --- |
| AirAsia Zest | EZD | Z2 | ZEST | 1995.0 | 11.0 | Pasay City |
| Cebu Pacific | CEB | 5J | CEBU | 1996.0 | 47.0 | Pasay City |
| Fil-Asian Airways | MSE | MX | FAA | 2008.0 | 1.0 | Lapu-Lapu City |
| PAL Express | GAP | 2P | AIRPHIL | 1996.0 | 21.0 | Pasay City |
| Philippine Airlines | PAL | PR | PHILIPPINE | 1941.0 | 51.0 | Pasay City |
| Philippines AirAsia | AAU | PQ | COOL RED | 2012.0 | 3.0 | Angeles City |
| Sky Pasada | WCC | SP | PASADA | 2010.0 | 2.0 | Pasay City |
| Spirit of Manila Airlines | MNP | SM | MANILA SKY | 2010.0 | 3.0 | Pasay City |
| Tigerair Philippines | SRQ | DG | SEAIR | 1995.0 | 17.0 | Makati City |
Question:
When did the oldest airline start operations?
Answer:
1941.0