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:
| Brand | Year founded | Year began making autos | Year joined GM | Markets served today |
| --- | --- | --- | --- | --- |
| Baojun | 2010.0 | 2010.0 | 2010.0 | China |
| Buick | 1899.0 | 1903.0 | 1908.0 | North America, China, Israel |
| Cadillac | 1902.0 | 1902.0 | 1909.0 | North America, Europe, Asia, Middle East |
| Chevrolet | 1911.0 | 1911.0 | 1917.0 | Global, except Australia, New Zealand |
| GMC | 1901.0 | 1901.0 | 1909.0 | North America, Middle East |
| Holden | 1856.0 | 1908.0 | 1931.0 | Australia, New Zealand |
| Jiefang | 2011.0 | 2011.0 | 2011.0 | China |
| Opel | 1862.0 | 1899.0 | 1929.0 | Africa, Asia, Europe, South America |
| Wuling | 2002.0 | 2002.0 | 2002.0 | China |
| Vauxhall | 1857.0 | 1903.0 | 1925.0 | United Kingdom |
Question:
What is the average year to begin making autos for a brand that joined GM in 1917?
Answer:
1911.0