请教大家下，这个曲线应该用什么模型拟合？

数据：
x:590.800000000000 760.300000000000 902.300000000000 1052.30000000000 1171.30000000000 1345.30000000000 1528.30000000000 1685.30000000000 1827.30000000000 1974.30000000000
y:0.325090615586867 0.550935262885520 0.671509344787104 0.729239950960523 0.715060229635518 0.654354684837871 0.575348323655091 0.484227099214052 0.334350079507915 0.000593166195299907