java.threads.started increase quickly

i am confuse what java.threads.started means? is it relate to the threads show in jstack

when I execute the script:

jcmd 796 PerfCounter.print |  grep thread

the result is:

java.threads.daemon=47
java.threads.live=51
java.threads.livePeak=67
java.threads.started=14621
sun.ci.threads=4
sun.rt.threadInterruptSignaled=0
sun.threads.vmOperationTime=374510691

the java.threads.started increase by about 40 per second, is it normal?