We present a measurement of the fraction of Lyman {alpha} (Ly{alpha}) emitters (X_Ly{alpha}_) amongst HST continuum-selected galaxies at 3<z<6 with the Multi-Unit Spectroscopic Explorer (MUSE) on the VLT. Making use of the first 24 MUSE-Wide pointings in GOODS-South, each having an integration time of 1h, we detect 100Ly{alpha} emitters and find X_Ly{alpha}_>~0.5 for most of the redshift range covered, with 29 per cent of the Ly{alpha} sample exhibiting rest equivalent widths (rest-EWs)<=15{AA}. Adopting a range of rest-EW cuts (0~75{AA}), we find no evidence of a dependence of XLy{alpha} on either redshift or ultraviolet luminosity.