In 2018, the leadership of the Social Democratic Party (SPD) has proposed a coalition government with the Christian Democratic Party (CDU) and Christian Social Union (CSU), known as a "grand coalition" ("Groko"). First a vote was taken among about 700 delegates at a conference, which "try to achieve a Groko" won by 56% to 44%, and now a vote has started among the party's 470,000 members (on "go ahead and implement the provisional agreement with the other parties")
In 2013, the SPD leadership proposed a similar grand coalition with the CDU and CSU, and in a vote among the membership 76% voted in favour. In that year, prior to the members' vote was there also a vote at a delegate conference? If so, what proportions of delegates voted for and against Groko?
For those who like graphics: