Read the following paragraph carefully and answer the questions that follows:
Thus, with the elections of 1989, a long phase of coalition politics began in India. Since then, there have been eleven governments at the Centre, all of which have either been coalition governments or minority governments supported by other parties, which did not join the government. In this new phase, any government could be formed only with the participation or support of many regional parties. This applied to the National Front in 1989, the United Front in 1996 and 1997, the NDA in 1997, the BJP- led coalition in 1998, the NDA in 1999, and the UPA in 2004 and 2009. However, this trend changed in 2014. Let us connect this development with what we have learnt so far. The era of coalition governments may be seen as a long-term trend resulting from relatively silent changes that were taking place over the last few decades.
In the 1980s, the Janata Dal brought together a similar combination of political groups with strong support among the OBCs. The decision of the National Front government to implement the recommendations of the Mandal Commission further helped in shaping the politics of ‘Other Backward Classes’. The intense national debate for and against reservation in jobs made people from the OBC communities more aware of this identity.
Q. In which years, mentioned above, did NDA have coalition governments?