The graph below shows the amount of changes to NASDAQ-100 stock index between 1995 and 2014. The largest number of component shuffling happened in 1999 during the height of the dotcom-boom: during this year 30 companies were replaced. The number of removals and additions have been decreasing. In 2014, only three companies were switched. The average number of replacement during the past 15 years has been 14.6 changes. The numbers do not take account the addition of additional stock classes of companies already part of the index. During 2014, six additional share lines were added to the index, making the total amount of components 107 in 12/31/2014.