calculate tcp retransmission rate

I ran the following command.. gunzip -c 201509211400.dump.gz | tshark -nr - -Y "tcp.analysis.retransmission" -T fields -e tcp.stream -e ip.src -e tcp.srcport -e ip.dst -e tcp.dstport -e expert.message > table1.txt

13 197.94.235.198 80 152.188.170.15 43372 Retransmission (suspected)

77 443 40383 Retransmission (suspected)

Now i do not understand why there is no IP addresses for tcp streams 77?

I want to count tcp retransmission rate for each connection in my pcap file. I am using following method: The above command will give me all tcp streams with retransmissions. Then i am running following command..

tshark -nr file.pcap -Y "tcp.stream = x" -z conv,"tcp" x = one of the streams given by first command

then rate = ((no. of times x appear in the first command's o/p)/(total line in the conversation i.e second command o/p)) * 100

Is it the right way?