user if the SVP can get the 100,000 signatures to prompt Popular Initiative then the federal parliament is obliged to discuss the initiative, it may decide to recommend or to reject the initiative or it may propose an alternative. Whatever they choose to do, all citizens will finally decide in a referendum whether to accept the initiative, the alternate proposal or stay without change.
I could only easily find figures on popular initiatives up to 2010 (on my phone):
Of the 174 initiatives that made it to the polls, only 18 (10 per cent) got approved before 2010, all the others were rejected. In general, the approval of an initiative has been a very singular event until recently. With very few exceptions, the government and the parliament have always been against an initiative. Between 1949 and 1982 not a single initiative was passed. However, the rejection of initiatives was no longer the norm in the last 30 years: 11 out of 18 approved initiatives were passed in the last 30 years. Four of those initiatives were on environmental issues, two (UN membership, the national day to become a public holiday) were supported by the parliament and the government. Four issues specifically related to crime and foreigners were passed against the will of the parliament and the government. Those four issues have one common aspect – that they were launched by right-wing groups or parties, and in each case there was a discussion as to whether they should be declared invalid or not, because in each case it would have been difficult to implement the initiative without violating the international commitments of Switzerland. In all the cases, the parliament opted not to declare the initiative invalid.
pressto.amu.edu.pl/index.php/pp/article/viewFile/2910/2943
However, the 2014 referendum to restrict FoM was declared invalid:
It can go wrong though. In 2014, the Swiss voted to limit EU-migration to Switzerland, threatening the trade agreements with the EU, which are vital for the Swiss economy and impose the free movement of workers. The debates and polls showed that voters did not understand the lopsided power balance between the EU and Switzerland, and thought limiting EU-migration was an option devoid of consequences.
This year, the Swiss government drew the correct and courageous conclusion that their own indirect election afforded them enough democratic legitimacy to overturn the results of the poorly thought out 2014 EU immigration referendum.
www.prospectmagazine.co.uk/politics/take-it-from-the-swiss-the-brexit-referendum-wasnt-legitimate