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 | Office | Political Party | Occupation |
| --- | --- | --- | --- | --- |
| 1 | Ole Olsen Strømme | 1886–1901 |  | Church bell ringer |
| 2 | Peder Olai Kleppe | 1902–1919 |  | Fisherman |
| 3 | Olai Naustheller | 1920–1925 |  | Farmer |
| 4 | Mikkel Nilsen Birkeland | 1926–1935 |  | Farmer |
| 5 | Magnus Larssen | 1935–1937 |  | School teacher |
| 6 | Salomon O. Fagerbakke | 1938–1945 |  | Fisherman |
| 7 | Salomon V. Kalvenes | 1946–1959 |  | Fisherman |
| 8 | Rikard S. Storebø | 1960–1969 | Liberal Party | Social security manager |
| 9 | Peder Kalve | 1970–1975 | Conservative Party | Maritime pilot |
| 10 | Magnus Stangeland | 1976–1981 | Centre Party | School principal |
| 11 | Knut K. Kalvenes | 1982–1985 | Conservative Party | Retailer |
| 12 | Hallvard Møgster | 1986–1989 | Christian Democratic Party | Captain |
| 13 | Inge Bjarne Storebø | 1990–2001 | Conservative Party | Bank manager |
| 14 | Olav P. Årland | 2001–2003 | Christian Democratic Party | Shipmaster |
| 15 | Helge André Njåstad | 2003- | Progress Party | Student |
Question:
since 1886 how many austevoll mayors have had maritime related occupations?
Answer:
6