In 1933, 9 million lived in countries occupied by Germany in WWII. If 6 million were killed, 3 million would be a fair estimate.
"The Holocaust was the systematic annihilation of six million Jews by the Nazis during World War 2. In 1933 nine million Jews lived in the 21 countries of Europe that would be military occupied by Germany during the war. By 1945 two out of every three European Jews had been killed. 1.5 million children were murdered. This figure includes more than 1.2 million Jewish children, tens of thousands of Gypsy children and thousands of handicapped children."
Schindler saved more than 1200.
"To more than 1200 Jews Schindler was all that stood between them and death at the hands of the Nazis. But he remained true to his Jews, the workers he referred to as my children. In the shadow of Auschwitz he kept the SS out and everyone alive - his Jews miraculously survived the Nazi Genocide ..
Today there are more than 7,000 descendants of Schindler's Jews living in US and Europe, many in Israel. Before the Second World War, the Jewish population of Poland was 3.5 million. Today there are between 3,000 and 4,000 left."