Before the third phase of the Lebanese Civil War, USD1 was worth:
LL 3.07 in 1965
LL 3.26 in 1970
LL 2.25 in 1975
about LL 4 in 1981
In 1986 the pound began to fall against the dollar. On 13 June a dollar was worth LL 36.50. two weeks later it was worth LL 47.[8]
LL 500 in 1987[9]
LL 900 in December 1989[10]
During the Civil War, the value decreased rapidly until 1992, when one US dollar was worth over LL 2,500. Subsequently, the value increased again, and since December 1997 the official rate has been fixed at LL 1,507.50 = USD1.00[4]
In August 2019, pressure on the fixed exchange rate with the US dollar started, creating a parallel market rate.[citation needed] In March 2021, the black market rate in Beirut was LL 10,000 = USD1.00[11] By July 2021, it was around LL 24,000 to the dollar.[12] On 26 May 2022, the value of the Lebanese pound dropped in the black market to LL 35,600 against the US dollar, its lowest value ever, despite the recently held general elections.[13]
https://en.wikipedia.org/wiki/Lebanese_pound