Israel:

Meanwhile, Begin's government provided incentives for Israelis to settle in the occupied West Bank, increasing friction with the Palestinians in that area. The Basic Law: Jerusalem, the Capital of Israel, passed in 1980, was believed by some to reaffirm Israel's 1967 annexation of Jerusalem by government decree, and reignited international controversy over the status of the city. No Israeli legislation has defined the territory of Israel and no act specifically included East Jerusalem therein. The position of the majority of UN member states is reflected in numerous resolutions declaring that actions taken by Israel to settle its citizens in the West Bank, and impose its laws and administration on East Jerusalem, are illegal and have no validity. In 1981 Israel annexed the Golan Heights, although annexation was not recognized internationally.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". When did Israel annex the Golan Heights?
1981