What year saw the formation of the coalition that won 26 seats in the 1999 Indian general election?
1998
Title: National Democratic Alliance (India)
Passage: The National Democratic Alliance (NDA) is a centre-right coalition of political parties in India.  At the time of its formation in 1998, it was led by the Bharatiya Janata Party (BJP) and had thirteen constituent parties.  Its honorary chairman is former Prime Minister Atal Bihari Vajpayee.  Also representing the alliance are L. K. Advani, former Deputy Prime Minister, who is the acting chairman of the Alliance, Narendra Modi, current Prime Minister and Leader of the House in Lok Sabha; and Arun Jaitley, Leader of the House in Rajya Sabha.  The coalition was in power from 1998 to 2004.  The alliance returned to power in the 2014 General election with a combined vote share of 38.5%.  Its leader, Narendra Modi, was sworn in as Prime Minister of India on 26 May 2014.
Title: Indian general election, 1999 (Tamil Nadu)
Passage: The Indian general election, 1999 polls in Tamil Nadu were held for 39 seats in the state.  The result was a victory for the National Democratic Alliance (NDA) which won 26 seats.  After leaving the NDA, All India Anna Dravida Munnetra Kazhagam, hoped to create some damage, but ended up losing 8 seats, compared to the 1998 Lok Sabha elections.  This is also the first time that Dravida Munnetra Kazhagam, allied with the Bharatiya Janata Party, helping them have power at the national level for the next 5 years with the NDA, before they joined the UPA.  The NDA, ended up losing 3 seats, compared to the election the year before, due to ADMK leaving the NDA, but the seats were made up, because DMK left the united front and joined the NDA.
Title: Indian general election, 2014
Passage: The Indian general election of 2014 was held to constitute the 16th Lok Sabha, electing members of parliament for all 543 parliamentary constituencies of India.  Running in nine phases from 7 April to 12 May 2014, it was the longest election in the country's history.  According to the Election Commission of India, 814.5 million people were eligible to vote, with an increase of 100 million voters since the last general election in 2009, making it the largest-ever election in the world.  Around 23.1 million or 2.7% of the total eligible voters were aged 18–19 years.  A total of 8,251 candidates contested for the 543 Lok Sabha seats.  The average election turnout over all nine phases was around 66.38%, the highest ever in the history of Indian general elections.
National Democratic Alliance (India) Indian general election, 1999 (Tamil Nadu)