Bulk inserts to MongoDB Collection with a for loop

[user@hostname bin]$ ./mongo hostname:37017/admin -u admin_mongodb -p --ssl
MongoDB shell version: 2.4.5
Enter password: 
connecting to: hostname:37017/admin
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
 http://docs.mongodb.org/
Questions? Try the support group
http://groups.google.com/group/mongodb-user
rs1:PRIMARY>
rs1:PRIMARY> use test
switched to db test
rs1:PRIMARY>
rs1:PRIMARY> for(var i = 1; i <= 100 ; i++){db.test_collection.insert({"_id" : i , "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : i }); sleep(1);}
rs1:PRIMARY>
rs1:PRIMARY> db.test_collection.count()
100
rs1:PRIMARY>
rs1:PRIMARY> db.test_collection.find().limit(9)
{ "_id" : 1, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 1 }
{ "_id" : 2, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 2 }
{ "_id" : 3, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 3 }
{ "_id" : 4, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 4 }
{ "_id" : 5, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 5 }
{ "_id" : 6, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 6 }
{ "_id" : 7, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 7 }
{ "_id" : 8, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 8 }
{ "_id" : 9, "title" : "How do I create manual workload i.e., Bulk inserts to Collection ", " Iteration no:" : 9 }
rs1:PRIMARY>
rs1:PRIMARY>