The number of mobile phone connections in 2010-11 was 3.88 crore (38.8 million) which increased by 37 lakh to reach 4.25 crore (42.5 million) in 2011-12, as per Delhi government statistics released by Chief Minister Sheila Dikshit on Tuesday.
The number of mobile connections in the entire country is estimated to be around 90 crore (900 million).
In 2009-2010, the number of connections in Delhi was 2.82 crore (28.2 million).
The number of fixed line phone connections in Delhi has also risen marginally from 28.38 lakh (2.83 million) in 2010-11 to 29.12 lakh (2.91 million) in 2011-2012.
The figures have been published in the Delhi Statistical Handbook 2012.
As per the statistics, around 500,000 vehicles were registered during 2011-12 taking the total number to 74.38 lakh (7.43 million) vehicles against 69.32 lakh (6.93 million) in 2010-11.
The number of cars and jeeps in 2011-12 increased to 23.43 lakh (2.34 million) from 21.73 lakh (2.17 million) in 2010-11.
On use of public transport, the figures showed that around 162 crore passengers travelled on Delhi Transport Corporation buses during 2011-12.
Around 111 crore (1.11 billion) passengers had travelled on DTC buses during 2010-11.
Delhi's per capita income, which indicates an average earning of a person, is the third highest in the country with Goa having a per capita income of Rs 1,32,719 topping the list, and closely followed by Chandigarh at Rs 1,20,912.
In an indication of sustained economic prosperity, the per capita annual income in the city has increased by over 16 per cent to Rs 1,75,000 in 2011-12
Haryana fight back, stretch match to final day
It's safety first for corporate India
Kejriwal urges Delhiites to burn electricity bills
Odisha sniff win against Haryana
'My most beloved Delhiite, author Arundhati Roy'