Year	Kolkata	Chennai	Delhi	Mumbai
	(Figures in '000)
1989-90	249	161	459	652
1990-91	259	174	521	699
1991-92	274	186	605	791
1992-93	301	208	689	898
1993-94	335	239	814	1036
1994-95	380	282	967	1241
1995-96	446	342	1167	1441
1996-97	521	422	1370	1642
1997-98	672	503	1551	1856
1998-99	853	625	1642	2012

Direct Exchange Lines have grown at the compound rate of 15% in Delhi and 13% in Mumbai over the period 1989-90-1997-98
Mumbai's DELs are the highest among all metros accounting for almost 40% of the DELs for all four metros

Infrastructure