Why did Railways reduce train tickets' advance reservation period to 60 days?

Indian Railways reduced advance reservation period for train tickets from 120 to 60 days due to 'no show' trend. It said that 21% reservations done for 61 to 120 day periods were getting cancelled and 5% passengers were neither cancelling their tickets, nor undertaking the journey. Improving ticket availability and reduction in cancellations were also reasons for the change.