Ion		No. of lines		Lines with transition probabilities		Lines with level designations
Tl I		65		25		11
Tl II		82		3		7
Tl III		22		0		0
Tl IV		35		0		0
Tl LXXIX		26		0		26
Tl LXXXI		13		12		13
Total:		243		40		57